Service difficulty report · Duct · Boeing 7377H4

Difficulty date
May 17, 2021
Submitted
June 30, 2021
Operation
Air carrier
Aircraft
N400WN
Make and model
Boeing 7377H4
Aircraft serial
27891
Aircraft time
66,325 hours, 39,077 cycles
Part
Duct
Condition
Corroded
Location
Thrust Reverser
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

NR 2 ENGINE INBOARD THRUST REVERSER INNER C DUCT INNER TRAILING EDGE SURFACE CORRODED ; / [01] PARTIALLY REMOVED CORROSION ON NR 2 ENG I/B T/R INNER C DUCT INNER T/E TO CHECK LIMITS. PER B-737-700 SRM 51-10-02-0G-0.; [02] VERIFIED PARTIAL REMOVAL OF CORROSION.; [03] MEASURED AREA PER B-737-700 SRM 54-30-01-1A-4 STEP 4.A(2) FIG 102 DETAIL C ;DEEPEST CORROSION PIT FOUND .028' FOUND OUT OF LIMITS; [04] VERIFIED OUT OF LIMITS.; [05] REMOVED #1 ENGINE I/B T/R REF B737-700 AMM 78-31-01-000-801 P/N 315A2295-673 S# 000750; [06] OK TO INSTALL SERVICEABLE T/R.; [07] ACCOMPLISHED #2 ENG INBOARD THRUST REVERSER INSTALLATION REFERENCE AMM 78-31-01-400-801-F00 P/N 315A2295-681 S/N 1371 UP TO STEP I.(9)(A) .TORQUE WRENCH B/C 16671 CALIBRATION DUE 01/26/22.; [08] VERIFIED STEP #7; [09] COMPLETED INSTALLATION OF #2 ENG INBOARD THRUST REVERSER REFERENCE AMM 78-31-01-400-801-F00 FROM STEP I.(10) TO I. (20) END OF TASK .PERFORMED ADJUSTMENT REFERENCE AMM 78-31-01-820-801-FOO SYSTEM LEAK CHECK; NO LEAKS NOTED;AND OPS CHECK NORMAL REFERENCE AMM 78-31-00-700-804-FOO;78-31-00-700-801-FOO;78-31-11-820-801-FOO;AND 78-31-03-700-801-FOO.NOTE: SLING P/N C78018-50 B/C# 160489 LOAD TEST DUE 08/2021;DYNAMOMETER B/C 160108 CALIBRATION DUE 26-SEP-21; PUSH PULL SCALE B/C 167240 CALIBRATION DUE 28-AUG-21;AND TORQUE WRENCH B/C 164347 CALIBRATION DUE 22-MAR-22.; [10] COMPLETED INSTALLATION T/R

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