Unanswered Questions

768 questions with no upvoted or accepted answers
12
votes
0answers
114 views

Why does spoiler extension cause straight-wing Learjets to pitch down, rather than up, and why did it take so long to discover this?

Straight-wing Learjets (the 23, 24, 25, 35, and 36), the first generation of the popular business-jet series, are (especially when not equipped with any of the many first- and third-party wing ...
9
votes
1answer
590 views

Can the RAM AIR valve cause depressurization on the CRJ-900?

On the CRJ-900 AIR-CONDITIONING panel there is a RAM AIR switch light which opens a valve and allows air from the ram air scoop to enter the mixing manifold for distribution to both the flight deck ...
9
votes
3answers
319 views

What would the altimeter indication be through a cold front?

Cold air is heavier than hot air because of its greater density, so the QNH of an airport inside a cold front would be higher. Flying towards the cold front would be, "low to high, hello sky". But I ...
8
votes
0answers
568 views

Can anyone identify what/where this photo is of?

This is a photo by the Real Photograph Co. (Liverpool) No.684. I think it may be a crashed WW1 Biplane (lots of the photos with it were WW1 biplanes).
8
votes
0answers
78 views

How is a 14 CFR 101 sUAS NOTAM filed for an unregistered aircraft?

FAA promotes the utilization of NOTAMs to announce sUAS operations, and requires it in 333 exemptions and some 107 waivers. However, sUAS (drones / model aircraft) under 14 CFR 101 have been ...
7
votes
0answers
154 views

Did the Phantom F-4 contain “polychron” or other synthetic materials as a replacement for rubber circa 1969?

update: In order to make it easier to answer this question, use of "synthetic materials as a replacement for rubber circa 1969" in any aircraft might be good enough. Michael Crichton's 1969 science ...
7
votes
0answers
150 views

How to know that single engine aeroplanes are not allowed to depart on the TETAN SID?

I'm studying for my IR exam and came across another tricky AIP question. Which of the following statements about the TETAN 1A standard departure chart are correct? Single engine aeroplanes ...
7
votes
1answer
328 views

What is the primary reason that the non-towered airports KACV and KTLV have E4 extensions to E2 airspace?

NOTE-- this question is not about why it was desired to protect the airspace that ended up within the E4 "extensions". Rather, this question is about why that was done by designating that airspace as ...
7
votes
0answers
305 views

What is the longest time after which plane crash survivors were rescued?

I found: Aviator Bob Gauchie detains the record for solo arctic survival by a downed airman, enduring 58 days of arctic weather before his rescue in Canada 1967. After 72 days on the glacier, 16 of ...
7
votes
0answers
438 views

How can I convert a frozen ATPL from South Africa to an Iranian one?

I have got a frozen ATPL license from South Africa and I'm from Iran. I came back home last year and I have converted my CPL/IR license to the Iranian piloting license by doing Air Law and Human ...
7
votes
1answer
103 views

Why are some US STAR fixes/waypoints included in FAA's legacy files but not in FAA's published STAR procedures?

I have noticed that some US STAR procedures include (slightly) different number of waypoints, depending on which source material is consulted. Take for example the CAMRN4 STAR and its corresponding ...
7
votes
0answers
300 views

Who was the first flight test engineer?

The discipline of Flight Test Engineering has existed since at least 1903, but when did engineers identify their work, distinguish their work from other disciplines, under terms that would mark it as ...
7
votes
1answer
184 views

How are “charter” and “passenger” flights defined in the AIDX standard?

I'd like to know the difference between these flight types in the IATA AIDX standard; specifically, for use in fuel order notifications.
7
votes
1answer
611 views

If an aircraft does not have an FDR, must one be installed to comply with Flight Data Monitoring requirements in EASA countries?

Flight Data Monitoring (FDM), which analyzes FDR data to accomplish things like ensuring that pilots are following SOP's, is a requirement for EASA's Third Country Operators (TCO) certification, ...
7
votes
1answer
708 views

When is this Class D airspace not Class D airspace?

The Terminal Area Chart (TAC) shows the Class D airspace for Los Angeles International Airport (KLAX) view the full TAC. I have highlighted in green the north and south portions of the Class D ...

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