SDR ASMF201211001

Service difficulty report · Regulator · Boeing 737752

Difficulty date: October 21, 2012
Submitted: November 12, 2012
Operation: Air carrier
Aircraft: N906AM
Make and model: Boeing 737752
Aircraft serial: 29356
Aircraft time: 26,309 hours, 14,270 cycles
System (JASC): 3610 · Pneumatic Distribution System
Part: Regulator
Part number: 1074926
Part serial: 10029
Condition: Damaged
Location: Bleed Air
Part time: 18,660 hours, 9,456 cycles
Stage of operation: TO
How discovered: O
Nature of condition: J
Precautionary procedure: C

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

What was found

REJECTED TAKEOFF AT 60 KNOTS DUE TO LT ENGINE PRESSURE DROP OF 15 PSI IN PNEUMATIC DUCT AND LT OVER WING LIGHT TURNED ON. MX PERSONNEL REPLACED THE BLEED AIR REGULATOR, 450 DEGREE THERMOSTAT, PRSOV AND PRECOOLER CONTROL VALVE WERE REPLACED IAW MM 36-11-03, MM 36-11-05, MM 36-11-04 AND MM 36-12-03 RESPECTIVELY. LIKEWISE, THE ENGINE BLEED AIR CROSSOVER OPS TEST WAS PERFORMED IAW MM 36-11-00, TESTED CORRECT.