gotAirbus
Posts: 791
Joined: Fri May 18, 2001 10:02 am

Chirping Sound After Landing And Reverse Thrust.

Wed Sep 18, 2002 7:00 pm

Hi! I hope I can get input from CRJ technicians and/or people who travel in the CRJs; however, if you hear the same sound (read paragraph below) on a different aircraft, feel free to post...

I took an America West Express CRJ-200 jet a while back and was wondering what the chirping sound was. It happened after the reverse thrusters ended and we were about to exit the runway into the taxiway. It sounds like a one time "chirp" as if something was retracted or de-activated...

Oh, and I am in the process of uploading that "chirping" sound if you want to hear what it's like (if I have the time to upload.)

(gotAirbus)-(got commonality?)-(Have A Nice Flight!)
(gotAIRBUS?) - (Got Commonality?) - (Have A Nice Flight!)
 
Night_Flight
Posts: 183
Joined: Wed May 26, 1999 9:00 am

RE: Chirping Sound After Landing And Reverse Thrust.

Fri Sep 20, 2002 8:19 am

The sound may be the sound of the pressure dumping our of the fuselage. When there is weight on the wheels, a switch is activated and the remaining pressurization gets dumped so the pressure is equal to that at ground level. This dumping may be the sound you are hearing.

-Night_Flight-
Remember when sex was safe and flying was dangerous?
 
bio15
Posts: 1048
Joined: Fri Mar 23, 2001 8:10 am

RE: Chirping Sound After Landing And Reverse Thrust.

Fri Sep 20, 2002 9:18 am

I'm not sure if you saw the wing at the time, but flap retraction perhaps?

-Alfredo
 
gotAirbus
Posts: 791
Joined: Fri May 18, 2001 10:02 am

RE: Chirping Sound After Landing And Reverse Thrust.

Sat Sep 21, 2002 4:50 am

Nop Bio15, just a chirp; not a whine+chirp, just like a flap would.

(gotAirbus?)-(Got Commonality?)-(Have A Nice Flight!)
(gotAIRBUS?) - (Got Commonality?) - (Have A Nice Flight!)
 
fr8tdog
Posts: 120
Joined: Wed Feb 16, 2000 4:25 pm

RE: Chirping Sound After Landing And Reverse Thrust.

Tue Sep 24, 2002 12:06 pm

its possible that it could be the translational cowls restowing...
most of us allow the engines to spool down a bit prior to stowing to prevent a big push from the engines......we have to be below 30% N1 when below 60kts
to prevent FOD ingestion....
fr8t... CL65/44 Capt.

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