ReportCanoa
I'm fly in any weather
- Joined
- Feb 22, 2003
- Posts
- 899
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ReportCanoa said:The other day I was daydreaming in cruise, wondering what that thing would do if the flaps just started up and out. Weird.
Ralph Cramden said:dang!
And I thought my windshield failure and double gen failure were enough for my gray hair. Glad that never happened to me, and good job recovering from the "can't happen" experience.
The part I forgot to mention. I had about 50 hours in the airplane and a brand new F/O......If I never fly the POS again, it will be too soon.
smfav8r said:Ralph Cramden said:dang!
And I thought my windshield failure and double gen failure were enough for my gray hair. Glad that never happened to me, and good job recovering from the "can't happen" experience.
The part I forgot to mention. I had about 50 hours in the airplane and a brand new F/O......If I never fly the POS again, it will be too soon.
So the FAR that states at least one pilot must have at least 75 hours in type doesn't apply to you?
smfav8r said:I've had uncommanded flap movement at FL320 in that piece of s**t.....Bombardier claims in can't happen, my a$$.
Recently, an operator reported that the wing flaps of a CRJ200 extended with no command while in cruise flight. The flight crew observed the EICAS flap indication showing an extension of the left flaps to 10 degrees, while experiencing a minor un-commanded roll to the right following autopilot disconnect.
During troubleshooting following the flight, the Flap Electronic Control Unit (FECU) and flap Power Drive Unit (PDU) were replaced. Prior to removal, the fault logs of the FECU were interrogated, and no faults were logged for the applicable flight leg. During a subsequent ferry flight, anomalous EICAS flap indications continued. Final resolution of the issue on the subject aircraft was achieved by replacement of the left Flap Position Transmitter Unit (FPTU).
The investigation of this event has determined that there was NOT an un-commanded flap deployment. What was perceived as a flap deployment was in fact due to an erroneous EICAS indication for the left flap (EICAS flap position indication is independent of the flap control system), coupled with the perception of a sympathetic physical response of the aircraft to the EICAS indication (it is possible for a small amount of roll mistrim to be present during autopilot operation, which can trigger minor rolling movements upon autopilot disengagement until the
aileron trim is adjusted).
While there have been several reported events similar to the one described above, uncommanded flap operation on the CRJ series fleet has never occurred. In all known reported events, the issue was resolved by rectification actions taken for the FPTUs, not for the flap control system.
Bombardier Aerospace will release a Service Letter in the near future to discuss technical details of the issue and to recommend appropriate actions when abnormal EICAS indications for flap position occur.
Ralph Cramden said:3. double gen failure on rotation with apu defered. (Um, there's that noise again?)