SDR DALA2014072404205

Service difficulty report · Clamp · Boeing 737832

Difficulty date: July 22, 2014
Submitted: July 25, 2014
Operation: Air carrier
Aircraft: N385DN
Make and model: Boeing 737832
Aircraft serial: 30348
Aircraft time: 46,836 hours, 19,148 cycles
System (JASC): 2120 · Air Distribution System
Part: Clamp
Condition: Unsecure
Location: Flex Duct
Stage of operation: CL
How discovered: O
Nature of condition: J
Precautionary procedure: A

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

What was found

DURING FLIGHT AT FL 370, CREW WAS UNABLE TO MAINTAIN CABIN PRESSURE IN AUTO/MANUAL. DECLARED AN EMERGENCY, DESCENDED TO 10,000 FT FROM FL370 AND DIVERTED. MAINTENANCE PERFORMED PRESSURIZATION LEAK CHECK. BOTH CONTROLLERS LISTED "LO INFL/HI LEAK RATE CODES. FOUND AFT P-DOME FLEX DUCT CLAMP NOT SECURED. REPLACED CLAMP. PERFORMED CABIN PRESSURE LEAK TEST IAW AMM. CHECKED GOOD. AIRCRAFT RETURNED TO SERVICE.