Service difficulty report · Transmitter · Boeing 737900ER

Difficulty date
April 5, 2021
Submitted
April 5, 2021
Operation
Air carrier
Aircraft
N38458
Make and model
Boeing 737900ER
Aircraft serial
37199
Aircraft time
28,344 hours, 10,091 cycles
Engine
Cfmint CFM567B26E
Part
Transmitter
Condition
Faulted
Location
Fuel Flow
Stage of operation
TO
How discovered
O
Nature of condition
J
Precautionary procedure
C

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

What was found

DURING TAKEOFF ENG 2 FUEL FLOW WAS LOW AND FLUCTUATING WITH FILT ER BYPASS LIGHT ILLUM. ON CALL CONTRACT MX PERFORMED EEC BITE I.A.W FIM TASK 73-00-00-810-801-F00 AND FOUND 1 MSG FOR FUEL FILTERS DISAGREE BOWL TO BE CLEAN I.A.W AMM 73-05-00-810-801-F00 . 73-31072. INSPECTED ENGINE AND FOUND NO EVIDENCE OF A FUEL LEAK . INSPECTED FUEL FILTER AND FOUND BOTH THE FILTER AND FILTER 73-34-01-000-801-F00 & 73-34-01-400-801-F00. WET MOTORED E2 AND REPLACED E2 FUEL FILTER DIFFERENTIAL BYPASS SWITCH PER AMM BOTH TRANSMITTER AND DIFF BYPASS SWITCH LEAK CHK''D GOOD. BOTH 73-31-01-000-801-F00 & AMM 73-31-01-400-801-F00, AND REMOVED AND REMOVED AND REPLACED E2 FUEL TRANSMITTER PER AMM PART REPLACEMENTS REQUIRE TEST 3A IDLE LEAK CHK, BUT DUE TO THE ABORTED T/O, TECHS WILL PERFORM PART POWER RUNS TO VERIFY BYPASS LIGHT. ROTABLE PARTS CHANGE WAS INDICATED - TT # 1997855 SN OFF 2252 TT # 1152144 SN OFF 2577 SWITCH, INDICAT OFF 29-7334-9-9001 2252 ON 29-7334-9-9001 5179 TRANSMITTER, EN OFF 29-7331-9-0001 2577 ON 29-7331-9-0001 8024 PERFORMED ENGINE RUNS PER AMM AMM 71-00-00 POWER TEST. OPS AND LEAK CHECKS GOOD. NO MESSAGES PRESENT DURING RUNS. NOTE: MEL TO REMAIN OPEN UNTIL A/C ARRIVES TO IAH WHERE THE MEL WILL BE CLEARED AS LONG AS E2 BYPASS MESSAGE IS NOT PRESENT.

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