Service difficulty report · Skin · Boeing 737924ER

Difficulty date
July 22, 2021
Submitted
July 23, 2021
Operation
Air carrier
Aircraft
N64809
Make and model
Boeing 737924ER
Aircraft serial
42821
Aircraft time
24,975 hours, 8,928 cycles
Part
Skin
Part number
141A352133
Condition
Dented
Location
Bs 251
Stage of operation
IN
How discovered
9
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

DAMAGE ON SKIN R/H SIDE NOSE AREA FS251.6 PER AVO9056 REV.A STEP1 COMPLETED ON L/P 6612667. STEP 4 COMPLETED PER NDT PART 4-51-00-00-03. STEP 5 HFEC EXTERNALLY COMPLETED PER NDT PART 6-51-00-00-23 WITH NO FINDINGS. STEP 6 COMPLETED WITH A CREASED DENT FOUND. STEP 8 COMPLETED PER NDT PART 6-51-00-00-23 WITH NO FINDINGS. PER STEP7 FOUND BLENDED AREA AT DENT TO BE A LOW THICKNESS OF 0.027". PER AVO 9056 REV.A, ACCOMPLISHED STEPS 2 AND 3. TRIMED OUT DAMAGED AREA AND REMOVED EXISTING FASTENERS AROUND TRIMED OUT DAMAGED REF AVO 9056 REV A STEP 9. PERFORMED INSPECTION OF TRIM AREA ACCORDING TO AVO 9056 REV A STEP 9, WITHIN LIMITS, RII INSPECTION REQUIREMENTS C/W NDT MANUAL PART 6 51-00-00 PROCEDURE 23, NO CRACKS DETECTED. REF AVO 9056 REV C STEP 10, PERFORMED HFEC TO SKIN SURFACE IAW REF AVO 9056 REV C, PERFORMED STEP 11 HFEC OF FASTNER HOLES IAW NDT MANUAL PART 6 51-00-00 PROCEDURE 16, NO CRACKS DETECTED. FASTNER HOLES IAW NDT MANUAL PART 6 53-30-00 PROCEDURE 3, NO CRACKS DETECTED. REF AVO 9056 REV C STEP 12, PERFORMED HFEC OF COUNTERSINK REF AVO 9056 REV(D), STEP 13, ACP THICKNESS MEASUREMENT IAW B737NTM PT4 51-00-00-02. SEE ATTACHED IMAGES. RESULTS PROVIDED TO ENGINEERING RELOADED IMAGES SO GRID PATTERN COINCIDES WITH IMAGE QC UPDATE - RII INSPECTIONS FOR AVO 9056 STEPS 2 AND 3 PERFORMED. OK TO CONTINUE FOR RII PURPOSES, VERIFIED STEP 2&3 OF AVO9056 HAVE BEEN COMPLIED WITH. ABOVE VERIFICATION IS FOR AVO9056 "REV E" ENLARGED THE TRIM OUT AS SHOW ON FIG. 8 OF AVO9056 STEP 15