Service difficulty report · Shutoff Valve · Boeing 7377H4

Difficulty date
May 20, 2026
Submitted
May 21, 2026
Operation
Air carrier
Aircraft
N474WN
Make and model
Boeing 7377H4
Aircraft serial
33861
Aircraft time
71,381 hours, 42,885 cycles
Engine
Cfmint CFM567B242
Part
Shutoff Valve
Condition
Leaking
Location
Nr 2 Engine
Stage of operation
CL
How discovered
O
Nature of condition
M, J
Precautionary procedure
A

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

What was found

DURING CLIMB WE RECIEVED A M/C LIGHT OVHT/DEL ASSOCIATED WITH NR 2 ENGINE OVERHEAT LIGHT FOLLOWED THE QRC FOLLOWED BY THE QRH THE LIGHT EXTINGUISH ONCE WE BROUGHT THE T/R DOWN TO 40%. PERFORMED FIM 26-10 TASK 805. PERFORMED ENGINE/APU FIRE DETECTION CONTROL MODULE BITE PER 26-10-01, OPS CHK GOOD. PERFORMED RESISTANCE CHECK OF NR 2 ENG FIRE LOOPS IAW WDM 26-11-21, ALL RESISTANCE WITHIN LIMITS. INSPECTED NR 2 ENG FIRE DETECTORS REF AMM 26-11-01; NO DEFECTS NOTED. PERFORMED NR 2 ENG BLEED AIR LEAK CHKD IAW AMM 36-11-00. FOUND PRSOV LEAKING. R & R NR 2 ENG PRSOV IAW AMM 36-11-04, OPS & LEAK CHKD GOOD. PERFORMED NR 2 ENG HIGH POWER RUN IAW AMM 71-00-00, NO NR 2 ENGINE OVERHEAT INDICATION. ACFT OK FOR SERVICE.

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