Service difficulty report · Fire Detector · Boeing 7474R7F

Difficulty date
November 27, 2024
Submitted
December 2, 2024
Operation
Air carrier
Aircraft
N581UP
Make and model
Boeing 7474R7F
Aircraft serial
25866
Aircraft time
127,779 hours, 21,514 cycles
Part
Fire Detector
Condition
Faulted
Location
Zone 200
Stage of operation
TO
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

€Œ DET FIRE/OVHT 4 €Œ ILLUM ON. T/O AFTER V-1 ALL INDICATIONS NORMAL AFTER T/O. REFERENCE BAR CODE T3F18E005NC5S FOR MAINTENANCE ACTIONS C/W ON THIS ISSUE. C/W INSPECTION OF #4 ENGINE FOR PNEUMATIC LEAKS , NO LEAKS NOTED, INSPECTED OVHT/ FIRE LOOPS FOR DAMAGE, NONE NOTED , REMOVED AND REPLACED RELAY R8051 AND RELAY R8058 IN REF TO WDM FIRE AND OVERHEAT DETECTION- ENGINE 4 REFERENCE: 26-11-41-3. C/W GROUND TEST - FIRE SYSTEM REFERENCE: TASK 26-11-00-745-047 NUMEROUS TIMES, NO FAULTS NOTED PRESENT OR EXISTING. OKAY FOR FLIGHT. NO FURTHER MAINTENANCE REQUIRED

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