SDR IPXA2020073058411

Service difficulty report · Acm · Boeing 75724APF

Difficulty date: July 28, 2020
Submitted: July 31, 2020
Operation: Air carrier
Aircraft: N421UP
Make and model: Boeing 75724APF
Aircraft serial: 25281
Aircraft time: 30,222 hours, 19,873 cycles
System (JASC): 2150 · Cabin Cooling System
Part: Acm
Condition: Seized
Location: Right
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

AT FL 370, RECEIVED A CABIN ALT WARNING. LT PACK OFF, IN AUTO 2. PRESSURIZATION WAS ABOVE 10,000 FT. DECLARED EMERGENCY, LANDED UNEVENTFULLY. ACCOMPLISHED DMP 21-51-1. RT ACM FOUND SEIZED WITH DEBRIS. REMOVED IAW AMM 21-51-03-004-001. ALSO FOUND WATER NOZZLE CLOGGED. INSTALLED RT ACM IAW AMM 21-51-03. R & R RT WATER SPRAY NOZZLE IAW AMM 21-53-05. BOTH OP & LEAK CHECKED GOOD.

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