SDR AALA201904059022

Service difficulty report · Valve · Boeing 737823

Difficulty date: February 7, 2019
Submitted: April 5, 2019
Operation: Air carrier
Aircraft: N902AN
Make and model: Boeing 737823
Aircraft serial: 29504
Aircraft time: 58,934 hours, 24,176 cycles
System (JASC): 2820 · Aircraft Fuel Distribution System
Part: Valve
Condition: Faulty
Location: Fuel System
Stage of operation: NR
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

AIRCRAFT WAS GROUNDED: 10 MINUTES AFTER SECURING LEFT PACK PER BLEED TRIP, QRH PROCEDURE, CABIN ALTITUDE WARNING SOUNDED. EMERGENCY DECLARED, DONNED THEIR O2 MASKS (NO CABIN O2 MASK DEPLOYED) AND DIVERTED TO MIA. FLIGHT LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE REPLACED 450 SENSOR IAW AMM 36-11-05 AND REPLACED PRECOOLER CONTROL VALVE PER AMM 36-12-02 AND PERFORMED SATISFACTORY OPERATIONAL CHECK IAW AMM 71-00-00.