Service difficulty report · Computer · Boeing 737*

Difficulty date
October 21, 2012
Submitted
September 14, 2015
Operation
Air carrier
Make and model
Boeing 737*
Engine
Cfmint CFM567B27
Part
Computer
Part number
162700100
Condition
Failed
Location
Feel
Part time
31,326 hours
Stage of operation
NR
How discovered
9
Nature of condition
O
Precautionary procedure
O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

(CAN) DURING TAKEOFF, THE FLIGHT CREW REPORTED THE ACFT REQUIRED MORE ELEVATOR FORCE THAN NORMAL TO ROTATE. ONCE AIRBORNE THE REQUIRED FORCE WAS TRIMMED OUT WITHOUT DIFFICULTY. ALL OTHER PHASES OF FLIGHT WERE REPORTED AS NORMAL. ON APPROACH, DUE TO THE POSSIBILITY OF REDUCED CONTROL AUTHORITY, THE FLIGHT CREW ELECTED TO DECLARE AN EMERGENCY LANDING WHICH WAS EXECUTED WITHOUT INCIDENT. MAINTENANCE CARRIED OUT THE FOLLOWING ACTIONS, STABILIZER MANUAL TRIM AND TRIM INDICATOR TEST C/O IAW MM 27-41-00-700-801, FOUND SERVICEABLE. ELEVATOR TAB CONTROL SYSTEM -OPS TEST C/O IAW MM 27-31-00-700-815, FOUND SERVICEABLE. ELEVATOR PITOT SYS LEAK TEST C/O IAW MM 37-31-17-790-801, FOUND SERVICEABLE. ELEVATOR FEEL FORCE SYS TEST C/O IAW MM 37-31-00-700-812, TEST FAILS AT 185 KTS SETTING. ELEVATOR FEEL COMPUTER REMOVAL/INSTALLATION CARRIED OUT IAW MM 27-31-37, LEAK AND OPS TESTS CARRIED OUT SERVICEABLE. THE ACFT WAS THEN RETURNED TO SERVICE. THE SDR WILL BE UPDATED WHEN TEARDOWN INFORMATION FROM ELEVATOR FEEL COMPUTER BECOMES AVAILABLE.