SDR CALA2015050400368

Service difficulty report · Clamp · Boeing 737724

Difficulty date: May 4, 2015
Submitted: May 4, 2015
Operation: Air carrier
Aircraft: N17719
Make and model: Boeing 737724
Aircraft serial: 28938
Aircraft time: 54,542 hours, 18,513 cycles
System (JASC): 3610 · Pneumatic Distribution System
Part: Clamp
Condition: Broken
Location: Duct
Stage of operation: CL
How discovered: 9
Nature of condition: O
Precautionary procedure: A

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

What was found

SHORTLY AFTER TAKEOFF FLIGHT ATTENDANT CALLED COMPLAINING ABOUT A VERY LOUD NOISE UNDER THE FLOORBOARDS IN THE AFT GALLEY. FLIGHT CREW NOTICED EAR POPPING & HIGHER THAN NORMAL CABIN DIFFERENTIAL. FLIGHT BURNED OFF FUEL & DIVERTED. TROUBLE SHOT TO BROKEN CLAMP & DAMAGED SEAL FOR THE APU PNEUMATIC DUCT AT THE AFT PRESS BULKHEAD. REPLACED SEAL & CLAMP IAW MM 3 6-13-01-020-801. ALSO FOUND MISSING FILLET FOR AFT CARGO DOOR FRAMES LOWER AFT. REPLACED & SEALED, PRESSURIZED ACFT NO ABNORMALITIES NOTED.