Questions tagged [cockpit-alerts]

The lights, displays, sounds, shakers, etc. that attract the flight crew's attention to various situations.

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What are the Boeing 777 aural alerts indicating in this ATC recording?

There was a recent incident (avherald.com) with an Air France Boeing 777 on approach to CDG where several different aural warnings can be heard in the ATC audio recording (YouTube) when the pilot has ...
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10 votes
1 answer
704 views

Why do Audio Engine Fail Alarms not state which engine has failed?

When an engine fails on e.g. a 737, an alarm sounds to indicate an engine fire (but not failure). Why however, is there no verbal alarm stating which engine has failed, in the same way that "...
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0 votes
0 answers
82 views

Aural alerts for advisory function

As per the advisory circular, it is not normal to have both visual and aural awareness for advisory function. Is their any deviation or any example where both is required for advisory function. ...
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8 votes
2 answers
3k views

Why doesn't the 737 MAX have an APU EGT gauge like all other 737s do?

On Original, Classic, and Next Generation 737s, the APU panel has an EGT (exhaust-gas temperature) gauge below the four APU caution/warning lights (all images in this question are from the 737 ...
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3 votes
1 answer
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What does the sound and flashing button indicate during this landing?

What does the sound in this YouTube video indicate? It is accompanied by a flashing button. Does that sound indicate the touchdown of both the main and nose landing gear? The pilot also pressed the ...
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1 vote
1 answer
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Aircraft engine communication with satellite

Do pilots get an audible indication when the engines are communicating with the manufacturer whilst in flight. Do these "pings" or "hanshakes" begin on start up and are they always ...
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1 answer
321 views

Why do some GPS receivers suppress RAIM integrity warnings after you pass the FAF?

RAIM performs an integrity check 2NM from the FAF. If RAIM is lost before the FAF, one should execute the missed approach. However, if RAIM is lost after passing the FAF, some GPS receivers will ...
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6 votes
2 answers
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What’s the difference between an AIRSPEED LOW warning and a STALL warning?

Just an enthusiast here; pardon the dumb question. Im a little confused between the difference of a stall and airspeed low. “An aircraft Stall Warning System is that system which provides the pilot ...
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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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13 votes
3 answers
7k views

Why are cockpit alarms still so distracting and unable to be silenced?

I'm watching video RV 10 N783V My 1st Emergency At 8:45 a stall alarm goes off and is a horrible piercing whistle. Why? Surely the pilot has enough distractions without also being deafened while ...
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2 votes
2 answers
191 views

Is there a cockpit indication if the B737 flap load relief is not working properly?

On a 737, does the pilot get any cockpit indication that his Flap Load Relief is not working properly? Say for instance due to a Flap Lever Position Switch failure?
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4 votes
1 answer
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What's the difference between the "100 above" and "100" GPWS above callout?

Not all aircraft have both; this one does and can be heard at 1:12:
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5 votes
1 answer
342 views

Why does the 737 Original have an explicit hydraulic-quantity indicator for only the A hydraulic system?

The 737 (Original, Classic, NG, and MAX) has two primary hydraulic systems (A and B),1 which provide power to the aircraft’s flight controls and other aircraft components (like the wheelbrakes, ...
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1 vote
1 answer
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Does ELMS inhibit cabin pressure alarms on the 777, and would the MEC Override Vent be stuck open following an electrical failure?

I found this article rather interesting, but like most things on the internet, they can be wrong. I couldn't think of a better site to address this question. This user says: when ELMS takes over ...
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2 votes
1 answer
179 views

Why don't airliners use light strips on physical controls (yoke/stick, throttle and trim) to indicate who has control - pilot or flight computer?

I've watched a lot of Air Disasters episodes about crashes where pilots thought auto-pilot, auto-throttle, auto-trim were "in control" but they weren't (or vice-versa) due to some innocuous ...
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4 votes
1 answer
297 views

Can the Master Caution illuminate without the System Annunciator Panel on the 737NG?

Does the master caution light illuminate only with the System Annunciator Panel? Or is the master caution illumination also connected to the related system panels? I mean if there is an indication on ...
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7 votes
2 answers
266 views

Are warnings generally "source-focused" or "effect-focused"?

I have trouble wording this question, please bear with me. Sullenberger recently stated that the pilots of the fatal MAX flights where likely under sensory overload caused by "multiple, ...
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2 votes
2 answers
2k views

Why do I get an overspeed warning at 250kts below 10,000ft in Microsoft Flight Simulator?

I'm flying the Cessna CJ4. I get overspeed warnings at 250kts when below 10,000ft, and the speed indicator has red lines at 300kts. Are these warnings triggered because it'll damage the plane to go ...
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4 votes
1 answer
639 views

Can 737NG GPWS and other warning voice lines/sounds be played in headphones instead of cockpit speaker?

I watched a couple of cockpit videos on the 737NG landing, and I noticed GPWS in some of the videos does not announce 500ft, 400ft, 300ft, etc. Does this mean the pilots have routed these sounds into ...
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6 votes
1 answer
265 views

Why does enabling engine sync on the MD-80 series trigger the "Master Caution" light?

I fly in a consumer PC flight simulator. Among my virtual fleet is a fairly faithfully-reproduced MD-83. One fairly strange detail I noticed is that enabling engine sync (either on N1 or N2) in the ...
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3 votes
1 answer
300 views

What is the correct procedure for operating the engine fire extinguishers on an ATR72?

I am developing an application for airport fire crew and ground staff. Part of the application is to familiarize users with emergency procedures of various aircraft. I have a few questions about the ...
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2 votes
1 answer
360 views

Why does the APU Master Switch flash during a normal APU shutdown?

Hi all and Happy New Year!!! I have a question relating to APU shutdown procedures on Airbus A320. During normal APU shutdown sequences, I noticed that after around 1m20s, the FAULT legend on APU ...
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22 votes
2 answers
5k views

How do pilots know that the switch/knob they just switched on/off actually did what it's supposed to do?

With the plethora of switches/knobs/buttons etc present in airplane cockpits, how can pilots be really sure that a button they just pushed (either to enable/disable some electronic system or move some ...
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4 votes
0 answers
164 views

What flight conditions trigger the "altitude, altitude" callout on an A-10?

I saw this video that shows an A-10 mission in Afghanistan. At 4:31 and 6:08 the callout "Altitude, altitude" is audible. I would like to know which flight conditions are required to trigger the ...
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3 votes
1 answer
122 views

Why will windshear inop illuminate after landing in an MD-83?

Why will windshear inop illuminate on the annunciator panel after landing or before starting taxi in a McDonnell Douglas MD-83?
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6 votes
3 answers
2k views

Why does the low voltage warning light not illuminate when the alt switch is on, but the engine is off?

As part of the pre-flight inspection, one of the checks is to verify that the low voltage light is illuminated when switching just the battery on. This makes sense; there's a low voltage and the ...
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30 votes
2 answers
5k views

What is the purpose of the Dash 8’s “TOUCHED RUNWAY” warning light?

The DHC-8-400 (and possibly other DHC-8 variants) has (or, at least, had in late 2007, according to Appendix G of this AAR) a warning light labelled “TOUCHED RUNWAY”. The extract of the DHC-8-400’s ...
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3 votes
2 answers
1k views

Does the Boeing 737 NG have "5" radar altitude callout?

So, I was watching a video of a Boeing 737 NG land, and heard the "5" callout. Is that an airline option or something? EDIT : link to video
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5 votes
1 answer
786 views

What are the triggers of the MD-80's takeoff configuration warnings?

I'm helping develop sounds for a MD80 simulation and I've noticed the MD has up to 5 alarms that fire when you advance the throttle and the aircraft is not properly prepared for takeoff: "Beep beep ...
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1 vote
0 answers
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Is there a GPWS volume control in the audio control panel for the B737? [duplicate]

So, I was sitting in the front rows of an A320 and could obviously hear the AP disconnect. But I could not hear the GPWS altitude and RETARD callouts. I assume this is because the pilots set the GPWS ...
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10 votes
1 answer
2k views

What did the "gear warning horn" on the North American P-51 sound like?

I'm working on a sound project for a P51 simulation and I'm having real trouble trying to find a reference on how the P51 gear warning horn sounded like. What mechanisms were used in the '40s to make ...
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13 votes
1 answer
1k views

Why are there non-standard altitude callouts?

I just saw a YouTube video with an A340 landing. There were the regular altitude callouts (1000, 500, etc.) until the callout "110". I was quite puzzled by this. What are the conditions that the ...
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4 votes
2 answers
2k views

Why does Airbus suppress stall warnings in certain situations?

I was reading about Air France 447 and came across the line: The stall warnings stopped, as all airspeed indications were now considered invalid by the aircraft's computer due to the high angle of ...
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12 votes
4 answers
4k views

What is a 'Wing Loop Fault' on an A320 series Aircraft?

I was recently involved in a flight that had issues before take off. The plane was an Airbus 321. It was explained to me as being a "wing loop fault". The problem was that the ECAM messages were ...
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