Service difficulty report · Acoustic Panel · Boeing 737852

Difficulty date
September 27, 2020
Submitted
November 24, 2020
Operation
Air carrier
Aircraft
N950AM
Make and model
Boeing 737852
Aircraft serial
35115
Aircraft time
48,298 hours, 21,161 cycles
Part
Acoustic Panel
Condition
Dented
Location
Lt Engine
Stage of operation
IN
How discovered
9
Nature of condition
C
Precautionary procedure
K

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

What was found

DURING TRANSIT CHECK, IT WAS DETECTED A SEVERAL DENTS ON LEFT ENGINE INNER BARREL ACOUSTIC PANEL INLET COWL. MAINTENANCE PERSONNEL PERFORMED A REVISION, DETECTING A DENT OF 0.281" WIDTH AND 0.013" DEPTH, TWO DENTS OF 0.500" WIDTH AND 0.006" DEPTH, A DENT OF 0.125" LENGTH, A DENT OF 1.5" LENGTH AT LEFT ENGINE 6 HRS, 5:30 HRS, 7:30 HRS, 5:00 HRS POSITION AND ON SLAT 3. THE W/O´S 7049549, 7049551, 7049553, 7049554, 7049555, 7049557 AND 7049558 WERE ISSUED TO REPAIR THE DAMAGES DETECTED. SO THE ULTRASONIC, TAP TEST AND DVI INSPECTIONS WERE PERFORMED, IAW B737 NDTM PART 1, 51-05-01, NDTM PART 4, 51-00-00 PROCEDURE 2; NDTM PART 1, 51-05-01, SRM 54-10-01 ALLOWABLE DAMAGE 1, PARAGRAPH 4C (2), FIGURE 103, DETAIL C, NO DISBONDS NOR CRACKS FOUND OF ORIGINAL THICKNESS OF 0.032" WITH REMAINING THICKNESS OF 0.027 OUT OF LIMIT AND ORIGINAL THICKNESS OF 0.032" WITH REMAINING THICKNESS OF 0.029 WITHIN LIMITS; ANY DENTS WERE FOUND, IAW SRM 54-10-01-1A-1, PARAGRAPH 4C (3), FIGURE 103, DETAIL F AND ANY DENTS WERE FOUND WITHIN LIMITS, IAW SRM 54-10-01-1A-1, PARAGRAPH 4C (3), FIGURE 103, DETAIL F WHERE W/Y=3383; DAMAGES WERE REMOVED, IAW SRM 54-10-01-1A-1, PARAGRAPH 4C (2), FIGURE 103, DETAIL C; A PERMANENT REPAIRS WERE PERFORMED, IAW SRM 54-10-01-2R-7, PARAGRAPH 4, FIGURE 203. AN ALUMINIZED EPOXY PRIMER WERE APPLIED, IAW SRM 54-10-01-2R-7, PARAGRAPH 4F, ALL CORRECT.