<< >> NASA ASRS Report 582582, May 2003

A canadair CL65 in initial climb at 6000 ft declared an emergency and diverted due to the pitch trim system failure in a nose down condition. No system failure messages were displayed.

Attributes
ACN	582582
Time
Date	200305
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	msl single value : 6000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : zzz.tracon
Operator	common carrier : air carrier
Make Model Name	Regional Jet CL65, Undifferentiated or Other Model
Operating Under FAR Part	Part 91
Navigation In Use	other
Flight Phase	climbout : intermediate altitude cruise : level
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : cfi pilot : instrument pilot : multi engine pilot : commercial
Experience	flight time last 90 days : 170 flight time total : 4850 flight time type : 2300
ASRS Report	582582
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	other flight crewa other flight crewb
Resolutory Action	flight crew : declared emergency flight crew : diverted to another airport
Consequence	other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

After initial climb, we leveled at 6000 ft. Upon trying to trim the airplane for level flight, the pitch trim was unresponsive with a nose down or 'nose heavy' condition. The pitch trim indication was wavering between 1.8 and 2.4. The pitch condition of the airplane seemed stable. An emergency was declared, the QRH for stabilizer trim failure was completed, and a reduced flaps landing was successfully made. It should be noted that none of the system failure messages were displayed. Callback conversation with reporter revealed the following information: the reporter stated at no time during this incident did the EICAS system display any system failure messages. The reporter said maintenance replaced the motor control unit and both actuators on the jackscrew and repaired the wiring on the captains yoke.

Related reports:

• A canadair CL65 on initial climb at 1500 ft declared an emer...
• A canadair CL65 regional jet on initial climb at 3500 ft dec...
• A canadair cl-65 on initial climb declared and emergency and...

	Enter your search terms Submit search form
	Web www.37000feet.com

Original NASA ASRS Text

Title: A CANADAIR CL65 IN INITIAL CLB AT 6000 FT DECLARED AN EMER AND DIVERTED DUE TO THE PITCH TRIM SYSTEM FAILURE IN A NOSE DOWN CONDITION. NO SYSTEM FAILURE MESSAGES WERE DISPLAYED.

Narrative: AFTER INITIAL CLB, WE LEVELED AT 6000 FT. UPON TRYING TO TRIM THE AIRPLANE FOR LEVEL FLT, THE PITCH TRIM WAS UNRESPONSIVE WITH A NOSE DOWN OR 'NOSE HEAVY' CONDITION. THE PITCH TRIM INDICATION WAS WAVERING BTWN 1.8 AND 2.4. THE PITCH CONDITION OF THE AIRPLANE SEEMED STABLE. AN EMER WAS DECLARED, THE QRH FOR STAB TRIM FAILURE WAS COMPLETED, AND A REDUCED FLAPS LNDG WAS SUCCESSFULLY MADE. IT SHOULD BE NOTED THAT NONE OF THE SYSTEM FAILURE MESSAGES WERE DISPLAYED. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED AT NO TIME DURING THIS INCIDENT DID THE EICAS SYSTEM DISPLAY ANY SYSTEM FAILURE MESSAGES. THE RPTR SAID MAINT REPLACED THE MOTOR CTL UNIT AND BOTH ACTUATORS ON THE JACKSCREW AND REPAIRED THE WIRING ON THE CAPTAINS YOKE.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.