Service difficulty report · Control Module · Boeing 7377H4

Difficulty date
December 23, 2024
Submitted
December 26, 2024
Operation
Air carrier
Aircraft
N913WN
Make and model
Boeing 7377H4
Aircraft serial
29840
Aircraft time
53,762 hours, 32,736 cycles
Part
Control Module
Condition
Faulty
Location
Zn 100 Fus Lower
Stage of operation
TX
How discovered
9
Nature of condition
O
Precautionary procedure
K

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

What was found

ENG1 OVHT; ENG2 OVHT; ENG 1&2&APU FIRE HANDLES ILLUMINATED & WHEEL WELL LIGHT ILLUMINATED ON TAKEOFF ROLL WITH ASSOCIATED FIRE WARNING BELLS ON TAKEOFF ROLL (125KT)<[01] R&R ENG & APU FIRE CONTROL PANEL IAW AMM 26-00-01;[02] PERFORMED THE FOLLOWING OPERATIONAL CHECKS OF ENG & APU FIRE CONTROL PANEL:<BR><BR>-FIRE AND OVERHEAT DETECTION SYSTEM - OPERATIONAL TEST; PER AMM TASK 26-10-00-710-801 OPS CHECK GOOD.<BR>-ENGINE FIRE EXTINGUISHING BOTTLE SQUIB - CIRCUIT TEST; AMM TASK 26-21-00-730-801 OPS CHECK GOOD.<BR>-ENGINE FIRE EXTINGUISHING BOTTLE PRESSURE SWITCH CIRCUIT TEST; AMM TASK 26-21-00-730-802 OPS CHECK GOOD.<BR>-APU FIRE EXTINGUISHING BOTTLE PRESSURE SWITCH CIRCUIT TEST; AMM TASK 26-22-00-730-802 OPS CHECK GOOD.<BR>-WHEEL WELL; WING AND LOWER AFT BODY OVERHEAT DETECTION SYSTEM - OPERATIONAL TEST; AMM TASK 26-18-00-710-801 OPS CHECK GOOD.<BR><BR>REMAINING OPERATIONAL SUBTASKS STILL REQUIRED:<BR>-SUBTASK 26-00-01-720-002 (ENG FIRE SWITCH SHUT DOWN)<BR>-SUBTASK 26-00-01-720-004 (APU FIRE SWITCH SHUT DOWN)<BR>-SUBTASK 26-00-01-720-005 (APU SQUIB CIRCUIT TEST);[03] C/W REMAINING OPS CHECKS PER 26-00-01. OPS CHECK GOOD. REMOVED AND REPLACED APU AND ENGINE FIRE DETECTION CONTROL MODULE IAW AMM 26-10-01. OPS CHECK GOOD.

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