SDR K11A2022061700130

Service difficulty report · Pressure System · Boeing 737436

Difficulty date: June 17, 2022
Submitted: June 17, 2022
Operation: Air carrier
Aircraft: N405CK
Make and model: Boeing 737436
Aircraft serial: 25407
Aircraft time: 57,508 hours, 40,215 cycles
System (JASC): 2130 · Cabin Pressure Control System
Part: Pressure System
Condition: Failed
Stage of operation: CL
How discovered: L
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

CABIN ALTITUDE ALERT ON LOG PAGE 737-001-7778 AND SECOND FLIGHT LP 737-001-7779. CORRECTIVE ACTION & OTHER PERTINENT INFORMATION: LP 7778, R&R CABIN PRESSURE CONTROLLER IAW B737 AMM 21-31-21, OPS CHECKS GOOD NO DEFECTS NOTED. CORRECTIVE ACTION ON LP 7779 TROUBLESHOT AND FOUND #2 ENGINE NOT PUTTING OUT BLEED AIR, FOUND WIRE HARNESS FOR BLEED AIR REGULATOR NOT SECURE, SECURED WIRE HARNESS IAW SWPM 20-10-11, PERFORMED ENGINE RUNS IAW B737 AMM 71-00-00, SYSTEM OPS CHECKED GOOD