Service difficulty report · Modulating Valve · Boeing 7379

Difficulty date
September 9, 2023
Submitted
September 11, 2023
Operation
Air carrier
Aircraft
N954AK
Make and model
Boeing 7379
Aircraft serial
44104
Aircraft time
3,000 hours, 871 cycles
Part
Modulating Valve
Part number
632920703
Part serial
3100
Condition
Faulty
Location
#2 Engine
Part time
3,007 hours, 873 cycles
Stage of operation
LD
How discovered
V
Nature of condition
J
Precautionary procedure
K

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

What was found

MAINT LIGHT ON OVERHEAD PANEL ILLUMINATED ON LANDING ROLLOUT. GROUNDED - YES. ACTIVE FAULT ENG-2 FAMV MSG 36-12021 (HAS HISTORY LAST LEG ON LP. 60912561 REF. IFIM 36-12-00-810-802 INITIAL EVAL WAS PREVIOUSLY ACCOMP. SO FAULT ISOLATION NOW REQUIRED. ASA 10241 OPENED COWLS & THRUST REVERSERS #2 ENG. REF AMM 78-31-00. PERFORMED VISUAL INSPECTION OF FAMV & LINES. COULD NOT FIND ANY DEFECTS. CLOSED COWLS & THRUST REVERSERS. ASA 65494. OPENED COWLS &TR'S ON #2 ENGINE REF AMM 76-31-00. REMOVED AND REPLACED FAMV FILTER REF AMM 36-12-03 PER FIM TASK 36-12-00-810-802. PERFORMED FAMV TEST REF AMM 36-12-00-720-801. TEST FAILED. MAIN MESSAGE STILL ACTIVE. CLOSED COWLS & TR ON #2 ENGINE. ASA 55555 REMOVED AND REPLACED #2 ENG FAMV, ACCOMPLISHED OPERATIONAL CHECKS, CHECKS GOOD, STATUS MESSAGE AND MAINT LIGHT CLEAR. REF AMM 36-12-03-400-801. APPLIED AND REVERSED ALT. DEACTIVATION PER CH5 TABLE 3 ITEM 7.

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