Service difficulty report · Acoustic Panel · Boeing 737752

Difficulty date
September 29, 2020
Submitted
November 24, 2020
Operation
Air carrier
Aircraft
N788XA
Make and model
Boeing 737752
Aircraft serial
33788
Aircraft time
55,787 hours, 27,635 cycles
Part
Acoustic Panel
Condition
Damaged
Location
Intake
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 OVERNIGHT CHECK AT MEX STATION, IT WAS DETECTED A SEVERAL DENTS AND NICKS ON BOTH ENGINES INNER BARREL ACOUSTIC PANEL INLET COWL. MAINTENANCE PERSONNEL PERFORMED A REVISION, DETECTING A DENT OF 0.001" DEPTH AND 0.187" WIDTH; A DENT OF 0.002" DEPTH AND 0.375" WIDTH; A DENT OF 0.006" DEPTH AND 1.0" LENGTH; THREE NICKS OF 0.187 AND 0.125 LENGTH AT 6 HRS, BETWEEN 6 AND 7 HRS, 8 HRS POSITION, BETWEEN 9 AND 10 HRS AT BOTH ENGINES. THE WO´S 7051148, 7051150, 7051157, 7051160, 7051162, 7051163 AND 7051165 WERE ISSUED TO REPAIR THE DAMAGES DETECTED; ULTRASONIC, TAP TEST AND DETAILED VISUAL INSPECTION WERE PERFORMED ON DENTS AREA, IAW B737 NDTM PART 4, 51-00-00, PROCEDURE 2 AND NDTM PART 1, 51-05-01, NO DISBONDS OR CRACKS WERE FOUND WITH ORIGINAL THICKNESS OF 0.032" WITH MINIMUM THICKNESS REMAINING OF 0.029" AND 0.030 WITHIN LIMITS, IAW SRM 54-10-01. ALLOWABLE DAMAGED 1 PARAGRAPH 4C, FIGURE 103, DETAIL C DENTS WERE ACCEPTABLE, IAW COLLINS MESSAGE NUMBER CV-20-10967 REV A AND SRM 50-10-01, ALLOWABLE DAMAGE 1 PARAGRAPH 4.C.(3), DETAIL F, THE FINAL MEASUREMENT WAS 166.66; DAMAGES WERE REMOVED, IAW SRM 54-10-01-1A-1, PARAGRAPH 4 C(2)(A), FIGURE 103, DETAIL C AND BONDERITE WAS APPLIED, IAW SRM 54-10-01-1A-1, PARAGRAPH 4.2B1, ALL CORRECT.