Service difficulty report · Case · Boeing 737275

Difficulty date
May 1, 2001
Submitted
May 25, 2001
Operation
Air carrier
Make and model
Boeing 737275
Aircraft time
71,559 hours, 71,933 cycles
Engine
Pwa JT8D9A
Part
Case
Condition
Cracked
Location
Bypass Valve
Part time
41,258 hours
Stage of operation
CL
How discovered
O
Nature of condition
F
Precautionary procedure
A

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

What was found

(CAN) AFTER TAKEOFF TRAILING EDGE FLAPS WOULD NOT RETRACT. AFTER SEVERAL ATTEMPTS FLAPS RETRACTED. FLIGHT CONTINUED, LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE INSPECTION REVEALED TRAILING EDGE FLAP BYPASS VALVE MALFUNCTIONING. VALVE REPLACED. SUBSEQUENT VALVE OVERHAUL CONFIRMED VALVE BODY WAS CRACKED.