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SDR DALA2017032102266

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Service difficulty report · Mount · Boeing 757232

FAA SDR system

Difficulty date
July 2, 2016
Submitted
March 21, 2017
Operation
Air carrier
Aircraft
N6702
Make and model
Boeing 757232
Aircraft serial
30188
Aircraft time
59,546 hours, 22,044 cycles
Engine
Pwa PW2037
Engine time
54,422 hours, 20,129 cycles
System (JASC)
7120 · Engine Mount Section
Part
Mount
Condition
Damaged
Location
Engine
Stage of operation
IN
How discovered
V
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

DURING THE ACCOMPLISHMENT OF CMM 310N3020 (71-21-15) REPAIR 1-2, THE SHAFT END JOURNAL OF THE SUBJECT FORWARD ENGINE MOUNT BEAM REQUIRED MACHINING BELOW THE REPAIRABLE LIMIT (SEE FIGURE 1) IN ORDER TO COMPLETELY REMOVE PREVIOUS CHROME PLATING. AS A RESULT, THE SHAFT END JOURNAL WAS 0.0083 INCH BELOW THE MINIMUM REPAIRABLE LIMIT PER 757-200 SRM. REPAIR 1 AND 0.0283 INCH BELOW THE MINIMUM REPAIRABLE LIMIT PER CMM 71-21-15 REPAIR 1-2. REF ERA 555712-14 REV ORIG AND SHOP ORDER MO5335A.