Questions tagged [aircraft-certification]

Use this tag for questions regarding the certification of aircraft. If your question is regarding regulations or a specific country, please add the relevant tag and state so in your question.

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What could be the (in theory) shortest certification path for a piloted eVTOL?

The scenarios is: To certify a hybrid propulsion rotorcraft, with human crew (not a drone). The target is: highest safety level following the cheapest (resource wise) and fastest possible ...
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Can VANS RV-12 with Rotax 912 ULS be used/equiped in IFR? [duplicate]

May an instrument rated pilot fly a VANS RV-12 with a Rotax 912 ULS with the following equipment in VMC, under instrument flight rules for IFR training? Dynon 10" HDX Touch Screen Primary ...
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3 votes
1 answer
633 views

Why is FAA Aircraft Certification Service department named as AIR?

The acronym AIR doesn't match with the functional name "Aircraft Certification Service" "AIR (the Aircraft Certification Service) is the department within the FAA that develops and ...
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Is the use of 1/8 NPT ports on pitot/static instruments derived from an FAA standard?

On almost every pitot-static instrument used in general aviation aircraft, a 1/8 female NPT port is provided to connect the instrument to the pitot-static system. I was told that is is a requirement ...
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5 votes
2 answers
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How is it possible that the design criteria for turbulence intensity has nearly doubled, but the manoeuvring load factor is the same?

https://www.law.cornell.edu/cfr/text/14/25.341 Here it says the turbulence intensity used for certification is 90 feet per second. Before, it was 50 feet per second, that section was added in 1981. So ...
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0 votes
2 answers
129 views

Does a converted aircraft require recertification? Does it break manufacturer rights?

Here is a very interesting video shows how an Airbus A330 is converted from passenger plane to a cargo plane. There are lots of changes or modifications were made to the airplane to fit the new ...
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1 vote
0 answers
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How is the voting mechanism and FDI algorithm applied in transport aircraft?

How is the voting mechanism applied in modern transport airplanes for airdata/inertial reference sensors fault detection and isolation (FDI)? Are there any other FDI methods approved by the regulators ...
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2 votes
1 answer
139 views

Continuing Airworthiness Requirements During Major Modification

I am involved in a program where the aircraft (B737) will undergo a major modification taking approximately 2 years which will ultimately result in a new type certificate being issued under a new ...
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2 answers
242 views

Can a different company manufacture an FAA approved airframe or engine?

If a certain engine architecture or airframe design was granted FAA certification and then licensed to, manufactured and then sold by another company, would it still be certified? If not, would this ...
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3 votes
1 answer
92 views

In big transport jets, what is the difference between manoeuvring loads and gust loads?

In the design certifications for big transport jets, there are two factors that must be met in order for a new aircraft to be certified; manoeuvring loads, and gust loads. Why are these two separate ...
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4 votes
1 answer
250 views

How many thousands of flight hours does it take to certify a jetliner?

How much time in flight hours does it take for a civilian aircraft (the Airbus A350-1000 for example) to get its certification from say either FAA or EASA? To make the question more practical, I used ...
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What is the certification process for a new propeller blade design?

I am wondering whether a propeller blade design (say from Hatzell) is submitted to a specific agency for testing and approval, and if these designs are then registered. Looking through Hatzell's ...
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19 votes
1 answer
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FAA Aircraft Registration Form AC 8050-3 doesn't exist

I am preparing to certify a self-built aircraft as flightworthy and legal to fly, and was reading the required documents listed on FAA's Amateur-Built Aircraft Airworthiness Certification page when I ...
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2 answers
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Would fitting a T-tail on the 737 Max make MCAS unnecessary?

This is pretty far out, so I just pose it as a question for notion or ideas, rather than conclusive answers. Considering the differences in flight characteristics between the Boeing 737 Max-8 and ...
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22 votes
1 answer
2k views

What makes a jet single pilot certified?

Why are some small-ish jets (Embraer Phenom 300, Pilatus PC-24 for example) single-pilot certified? The pilot still has to fly+navigate+communicate. Why would a small jet be more manageable than a ...
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3 votes
1 answer
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Since when did European regulations require the ability to suppress alerts?

Thanks to @Gerry's comment on a recent answer of mine, the 2011 ruling on the FAA's amended 14 CFR § 25.1322 mentions: Adopting this rule also harmonizes flightcrew alerting standards between the FAA ...
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1 vote
2 answers
131 views

Is there a minimum weight requirement for an commercial aircraft?

For an aircraft to be approved for commercial usage (like Boeing 747s or Airbus 320s), is there any minimum weight requirements, just the aircraft (without passengers and crew).
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0 answers
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Does the Cessna 208B still require a part 23 waiver to operate with 14 seats?

The selected answer to this question refers to the applicability of part 23 to aircraft of nine passengers or less. Other countries certified the 208B with as many as fourteen passenger seats, using a ...
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2 votes
1 answer
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Are return springs on a carburetor throttle mandatory or not?

In many GA aeroplanes throttle control is connected mechanically to the throttle of carburetor via a cable. I read in some AFMs that in case of a cable failure, return springs will open the throttle ...
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2 votes
1 answer
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Are aircraft certified for inflight thrust reversal required to demonstrate controllability in an asymmetric-reverse-thrust scenario?

For most jetliners, the inflight use of reverse thrust is prohibited (and often physically impossible), due to the potential for loss of control in the event of an inflight reverser deployment (a ...
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2 votes
2 answers
340 views

Does transport-type certification account for engine separation and its possible effect on hydraulic lines?

This question is inspired by the United Airlines Flight 328 where the No. 2 engine is damaged. Some multi-engine aircraft are design to withstand the detachment of an engine while some are not. Boeing ...
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6 votes
3 answers
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People say that modern airliners are more resilient to turbulence, but I see that a 707 and a 787 still have the same G-rating. Why is this?

The 707 was introduced in the late 50's, the 787 in 2009. Back when Air France 447 had recently gone missing, many were speculating that the aircraft had broken up in the turbulence associated with ...
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0 votes
2 answers
794 views

What license will one need to fly the Aeromobil flying car in 2022?

Aeromobil are launching their "flying car" in 2022, after successful test flights. What kind of license / certification will be required to own / fly one of these? Presumably something less ...
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2 votes
0 answers
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Are there any autoland capable aircraft without autothrottles?

While reading the question Why couldn't the CRJ100/200 be equipped with triple-string autoland? I thought the CRJ cannot have autoland because it is not equipped with autothrottles. Somehow I ...
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1 vote
1 answer
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Factors to be considered when re-engining aircraft

What parts of the aircraft need to be adjusted / refitted / added when fitting new (different type) of engines? Also what what kind of re-certification regarding airworthiness etc. will be necessary?
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5 votes
1 answer
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Why will the 777X be tested for crosswind handling with wingtips raised?

Wikipedia says: As existing regulations do not cover the folding wingtips, the FAA issued special conditions, including proving their load-carrying limits, demonstrating their handling qualities in a ...
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2 votes
1 answer
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What do the different dates in a TCDS mean?

I have been trying to interpret Type Certificate Data Sheets and am coming up short on how to understand some of the dates listed. For example, here is the TCDS for the new Citation Longitude: How is ...
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3 votes
1 answer
669 views

Can an unserviceable component be fitted on a serviceable aircraft for a maintenance check?

I was doing some reading on aviation regulations and I wanted to understand from an expert whether the following situation is allowable or not. I have reviewed EASA continuing-airworthiness guidelines ...
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1 vote
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For the recertification flight(s) of the 737Max, will the FAA want to see a live runaway stabilizer?

With Boeing ready to start the testing Monday, will the FAA want to see a simulated runaway trim failure in flight?
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1 vote
1 answer
118 views

Does an heavy propeller aircraft (CS-25) have the Blu Line (Vyse) displayed on ASI?

Does a propeller aircraft that is categorized as CS-25 (EASA Regulation) have the Blue Line (Vyse) mandatory displyed on ASI? I know that would be the case for lighter aircraft (Less than 19000 lbs /...
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1 vote
2 answers
365 views

Which 2-seat 4th generation fighter/engine/configuration (de-militarized) would the best supersonic long-range civilian private transport?

Seeing recently -with some surprise- that former military jets of fairly recent vintage can be bought e.g. here and operated by (skilled+licensed²+rich³) private individuals after all classified/...
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1 vote
3 answers
597 views

What happens if an aircraft goes above maximum altitude? [duplicate]

We all know what happens when a plane goes overspeed... but what happens when a plane goes above their max. altitude? And why are planes certified maximum altitudes anyway? Is it because there won't ...
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1 vote
2 answers
108 views

Did Solar Impulse flight in commercial airspace and have kind of type 23 certification? [closed]

I read that the amazing Solar Impulse back in 2015 had circulated around the globe for 500 hours. It flew with speed 70 km/h and altitude of cruising 28000 ft. My questions are below Did it fly in ...
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4 votes
1 answer
365 views

Would "Mad" Mike Hughes' steam-powered rocket have been certified airworthy by the FAA?

Daredevil 'Mad' Mike Hughes died after his homemade rocket crashed on 22 February 2020. The cause appears to be the premature deployment of the parachute used for a safe return. He was hoping to reach ...
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1 vote
0 answers
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What is the current regulatory progress regarding autonomous aircraft carrying passengers?

Are there any lobbying groups working towards this? Has there been any word whatsoever from the FAA on this topic yet?
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3 votes
1 answer
274 views

Are the PW1100G and PW1400G engine series not certified by the FAA?

I was digging around the FAA type certificate data sheet (TCDS) database and I could not find the entries for the PW1100G and PW1400G engines series. I then went to the EASA TCDS database and both of ...
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1 vote
1 answer
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Can a part 103 ultralight weigh 400kg fully loaded? [duplicate]

I am designing an electric VTOL personal part 103 ultralight. My question is: I have 114kg for the ultralight, 100kg for the pilot and 30kg for the baggage. About 260kg is enough to be take off ...
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3 votes
1 answer
237 views

In which countries can I fly an FAA compliant Part 103 ultralight? [closed]

İf I have a legal part 103 ultralight as defined by the FAA, in which countries may I fly this ultralight in the world in addition to the USA?
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2 votes
1 answer
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How can I certify an ultralight design as complying with part 103?

Can you help me about which procedure do I need to follow in order to have a certificate that my design is part 103 ultralight. And as a information how long would it take to get the certificate and ...
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4 votes
1 answer
288 views

How do I get an airworthiness certificate for a prototype aircraft?

If I were to build a plane of my own design as a prototype for possible sales, what steps would I need to take to get an airworthiness certificate from the FAA? If it's truly a certified aircraft and ...
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6 votes
2 answers
498 views

Is the Boeing 777X being certified as a derivative of the 777 Classic?

Given the corner cutting Boeing did with the Max certification, is the FAA allowing the 777X to be certified as a derivative (easier) of the 777 Classic or requiring a new Type Certificate? (harder) ...
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4 votes
1 answer
152 views

Is a supertransporter considered a different aircraft type than the one it is derived from?

By supertransporter I mean the SuperGuppy (derived from the Stratocruiser), the B747LCF dreamlifter, the A300-600ST, the airbus beluga XL, and any other aircraft whose role is to transport so large ...
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21 votes
1 answer
5k views

What is the difference between "Type Certificate" and "Certificate of Airworthiness" for an aircraft?

I want to know what exactly is "Type Certificate" and "Certificate of Airworthiness" means for an aircraft.
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1 vote
1 answer
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Where can I find an aircraft's year of certification (airworthiness certificate)?

Is there a way to pull a list of all certified aircraft (of course only valid certifications) including the year of certification please? For example I am actually trying to identify when CRJ200 PF ...
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5 votes
3 answers
1k views

Why don't multiengine aircraft have to demonstrate spin recoverability?

(Building off this earlier question about spin-testing airliners.) For normal-category aircraft1 in the U.S. (at least), only single-engine (or, in the case of some gliders, no-engine) airplanes need ...
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2 votes
2 answers
835 views

At what point does an aircraft need a new type certificate vs a STC?

First post. Yes, I did search but this specific question has not been asked before. This answer is close, however: How does a mechanic determine if a repair or alteration requires a Supplemental Type ...
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19 votes
7 answers
4k views

What is the maximal acceptable delay between pilot's input and flight control surface actuation?

While I was watching a cockpit video of an A330 landing in which the pilot was frenetically moving its sidestick, I wander what was the reaction time of this flight by wire system. Indeed, the time ...
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1 vote
2 answers
76 views

Engine Oil Consumption limits part of certification?

Does anyone knows if Engine Oil Consumption limits are part of the engine certification requirements?
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1 vote
1 answer
208 views

Is it possible to obtain an STC for single-pilot ops in a jet certified for two pilots?

I have been doing research on whether or not one could realistically obtain an STC for a super-midsize jet certified for two pilots and legally fly it single-pilot. For reference, my chosen aircraft ...
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2 votes
0 answers
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Definition of Critical Part in type certification process

first time here :) I'm part of the team at Flytrex (flytrex.com) and we're working with the Aircraft Certification Office to certify one of the first UAS systems (drones) under new initiative to ...
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