SDR NACA2021071210001

Service difficulty report · Filter · Boeing 767323

Difficulty date: July 12, 2021
Submitted: July 15, 2021
Operation: Air carrier
Aircraft: N351CM
Make and model: Boeing 767323
Aircraft serial: 25201
Aircraft time: 104,058 hours, 18,229 cycles
System (JASC): 3610 · Pneumatic Distribution System
Part: Filter
Condition: Clogged
Location: Pneumatic System
Stage of operation: TX
How discovered: O
Nature of condition: J
Precautionary procedure: O

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

What was found

DISCREPANCY: MI ON THE GROUND IN KMIA @ 0900Z DUE TO NO RIGHT ENGINE BLEED AIR TO ACCOMPLISH A LEFT ENGINE CROSSBLEED START. RIGHT ENGINE BLEED AIR SWITCH OFF LIGHT HAS ILLUMINATED EVEN THOUGH THE BLEED SWITCH WAS IN THE ON POSITION. CORRECTIVE ACTION: PERFORMED FIM 36-10 FAULT TREE 837, FOUND CLOGGED PRSOV FILTER, REPLACED PER AMM 36-11-09. RIGHT BLEED SYSTEM OPS CHECKED AND CYCLED NORMALLY SEVERAL TIMES DURING ENGINE RUN PER 71-00-00