Service difficulty report · Modulating Valve · Boeing 7379

Difficulty date
October 10, 2023
Submitted
October 13, 2023
Operation
Air carrier
Aircraft
N977AK
Make and model
Boeing 7379
Aircraft serial
43391
Aircraft time
5,086 hours, 1,499 cycles
Part
Modulating Valve
Part number
632920703
Part serial
1747
Condition
Out Of Range
Location
#2 Engine
Part time
5,111 hours, 1,504 cycles
Stage of operation
IN
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

REFER TC 31-005-00 SMT MESSAGE BLEED FAMV RVDT R WITH ASSOCIATED CORRELATED MAINTENANCE MESSAGE 36-12031 ENGINE -2 FAMV RVDT SIGNAL IS OUT OF RANGE. GROUNDED - YES. (RESOLVED ON W/O: 1972725 TASKCARD: N/R-00002 ) THE RESISTANCE READINGS FOR ALL FIVE CONNECTIONS CALLED OUT IN THE IFIM 36-12-00-810-804 WERE GOOD. VISUAL INSPECTIONS WERE GOOD. WAS UNABLE TO REMOVED FILTER FOR INSPECTION. REMOVED AND REPLACED FAN AIR MODULATING VALVE ASSY IAW AMM 36-12-03-000-801 AND AMM 36-12-03-400-801. ETOPS GROUND FUNCTIONAL CHECKS GOOD IAW AMM ELECTICAL LRU REPLACEMENT TEST TASK 36-00-00-710-801, AND PNEUMATIC ENGINE ON -SYSTEM TEST TASK 36-00-00-730-801. FAN COWL AND T/R'S WERE OPENED AND CLOSED DURING MAINTENANCE IAW AMM 71-11-04 AND AMM 78-31-00, ALTERNATE DEACTIVATION PROCEDURES WERE USED DURING MAINTENANCE IAW MPM CH 5, 5-07-01, TABLE 3. AIRCRAFT RESTORED TO NORMAL AFTER MAINTENANCE. CLEARS PLT, SEAMC DAVE NOTIFIED.

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