SDR DALA201908014522

Service difficulty report · Shutoff Valve · Boeing 737932ER

Difficulty date: July 30, 2019
Submitted: August 1, 2019
Operation: Air carrier
Aircraft: N802DN
Make and model: Boeing 737932ER
Aircraft serial: 31917
Aircraft time: 20,279 hours, 7,553 cycles
Engine: Cfmint CFM567B27B1
Engine time: 20,276 hours, 7,551 cycles
System (JASC): 3610 · Pneumatic Distribution System
Part: Shutoff Valve
Condition: Malfunctioned
Location: Bleed Sys
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

ATB - DUE TO THE LEFT ENGINE BLEED AT ZERO. PERFORMED PNEUMATIC HEALTH CHECK. FOUND PRSOV CONTROL PRESSURE FLEX HOSE LEAKING. REPLACED SAME. ALSO HSR (HIGH STAGE REGULATOR) FAILED HEALTH CHECK. REPLACED HSR. REPLACED THE AACU AND THE BLEED AIR HARNESS. PERFORMED HIGH POWER PNEUMATIC SYSTEM CHECK. OPS CHECKS GOOD. AIRCRAFT RETURNED TO SERVICE. (6255598)