Service difficulty report · Heater · Boeing 7879

Difficulty date
February 22, 2024
Submitted
February 23, 2024
Operation
Air carrier
Aircraft
N29968
Make and model
Boeing 7879
Aircraft serial
60141
Aircraft time
32,392 hours, 3,202 cycles
Part
Heater
Part number
7010914H01
Part serial
578626D08L
Condition
Odor
Location
Aft Galley
Part time
45,701 hours, 6,174 cycles
Stage of operation
NR
How discovered
O
Nature of condition
B
Precautionary procedure
O

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

What was found

REF ACRID ELECTRICAL ODOR IN AFT CABIN, ACCOMPLISH AMM 05-51-99-991-282A-A & FIM 21-20-F5-72A-421 FOR SMOKE OR FUMES IN CABIN INSPECTIONS AS REQUIRED. SEND COMPLETED QUESTIONAIRE FORMS 46.6020 TO TOMC. TOMC BILSKI. CONTACT TOMC WITH FINDINGS. OK TO CLEAR AFTER ACCOMPLISHMENT OF FIM 21-20-F5-72A. PERFORMED FIM 21-20-F5-72A-421, COULD NOT DUPLICATE THE DISCREPANCY DESCRIBED ABOVE. NO ELECTRICAL ODORS WERE NOTED AFTER ALL OPERATIONAL TESTS OF THE PACK AND HEATING SYSTEMS. RAN UPPER AND LOWER RECIRC FANS ALONG WITH THE GALLEY SUPPLEMENTAL HEATERS(WHILE RUNNING GROUND TEST) SINCE ARRIVAL. NO ODORS WERE FOUND. PER TOMC REMOVED AND REPLACED THE L/H AND R/H AFT GALLEY SUPPLEMEMENTAL HEATERS. UPON REMOVAL OF THE LEFT SIDE, FOUND SOME DEBRIS THAT COULD BE CAUSING THE ODOR. RAN ALL PACK AND HEATING SYSTEMS AND NO ODORS HAVE BEEN OBSERVED AFTER INSTALL. ATTACHING PHOTOS OF POST FLIGHT REPORT FROM CREW. REMOVE AND INSPECT FOR CONDITION, BOTH LEFT AND RIGHT AFT GALLEY SUPPLEMENTAL HEATERS.

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