Service difficulty report · Pressure Switch · Boeing 737924ER

Difficulty date
May 24, 2024
Submitted
May 30, 2024
Operation
Air carrier
Aircraft
N66893
Make and model
Boeing 737924ER
Aircraft serial
42197
Aircraft time
27,259 hours, 9,905 cycles
Part
Pressure Switch
Part number
38762552
Condition
Malfunctioned
Location
Apu Oil
Stage of operation
NR
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

APU COLD SOAK START IS REQUIRED AFTER REPAIRS TO THE APU ARE COM PLETED. REFERENCE LP 8066831. NONE REF. LP 8066831. TEST FAIL. COLD SOAK. APU LOW OIL PRESSURE LIGHT ILLUMINATED. ETOPS VERIFI CATION FLIGHT REQUIRED AFTER REPAIR. FL 340 FLT 1944 DATE 24MAY24 DEP ORD ARR PHX RESULT U FLT LVL ''''UPON CLEARING THIS MEL ITEM, CONTACT TOMC FOR ASSIGNMENT OF MEL CARD 49001 OR 49003 TO ACCOMPLISH APU ETOPS VERIFICATION ADDITIONAL INFO FROM CREW AFTER THE INITIAL WRITE UP "WE ONLY TRIED IT ONE TIME INSTEAD OF THREE TIMES BECAUSE OF THE LOW FAILED VERIFICATION TEST. LOP COMPLIED WITH MEL FLIGHT.'''' PRESSURE LIGHT" DISPATCH DESK: 90 NAME: AS DATE: 24-MAY-24- NOC DESK: 739 NAME: MF DATE: 24-MAY-24- TOMC APPROVES MEL 4901A. REPLACED LOP PER AMM 49-94-22. MAG CHIP CLEAR, AFTER CHANGE NO CURRENT FAULTS WITH APU RUNNING PARTS USED: 29-4994-3-0001,QTY :1 00-0586-3-1342,QTY :1