SDR UIEA2021061401347

Service difficulty report · Clamp · Boeing 76738E

Difficulty date: June 10, 2021
Submitted: June 14, 2021
Operation: Air carrier
Aircraft: N641GT
Make and model: Boeing 76738E
Aircraft serial: 25132
Aircraft time: 90,275 hours, 25,581 cycles
System (JASC): 4950 · APU Bleed Air System
Part: Clamp
Condition: Leaking
Location: Apu Surge
Stage of operation: TX
How discovered: O
Nature of condition: J
Precautionary procedure: O

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

What was found

APU AIR DROPS TO 5 PSI DURING ENGINE START/ SLOWLY RECOVERS. TESTED NEW ENG VALVE, AMM 49-53-07, NO HELP, REINSTALLED ORIGINAL VALVE ASSY. INSTALLED APU SURGE CONTROLER VALVE HOSE CLAMP IAW AMM 49-53-01. PERFORMED OPS CHECK ON THE APU SURGE VALVE PER AMM 49-11-00. MAX PRESSURE 12 PSI ORIGINAL SURGE VALVE RE-INSTALLED.

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