SDR DALA2017110808009

Service difficulty report · Controller · Boeing 757232

Difficulty date: November 4, 2017
Submitted: November 8, 2017
Operation: Air carrier
Aircraft: N693DL
Make and model: Boeing 757232
Aircraft serial: 29725
Aircraft time: 64,293 hours, 24,637 cycles
System (JASC): 2131 · Cabin Pressure Controller
Part: Controller
Condition: Malfunctioned
Location: Cabin Pressure
Stage of operation: CR
How discovered: O
Nature of condition: J
Precautionary procedure: B

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

What was found

INTO ATL DUE TO CABIN ALTITUDE WARNING. CREW DESCENDED TO 10K FOR REMAINDER OF FLT. MASKS DID NOT DROP. PRESSURIZATION EVENTUALLY REGAINED THROUGH ALTERNATE CONTROLLER; EMERG RESCINDED. REPLACED NR 1 PRESS CONTROLLER PER AMM 21-31-02, REPLACED OUTFLOW VLV PER AMM 21-31-03. COMPLIED WITH SINGLE PACK CONFIDENCE CK PER AMM 21-51-00 AND EXCESSIVE CABIN PRESSURE LEAK CHECK PER AMM 05-51-24. PER MCC REQUEST REPLACED ALT WARNING SWITCH. ALL ITEMS TESTED PER AMM AND ODI CHECK LIST.