Service difficulty report · Skin · Boeing 7377H4

Difficulty date
March 22, 2021
Submitted
April 27, 2021
Operation
Air carrier
Aircraft
N934WN
Make and model
Boeing 7377H4
Aircraft serial
36642
Aircraft time
39,725 hours, 23,920 cycles
Part
Skin
Condition
Corroded
Location
Bs 500a
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

CORROSION FUSELAGE SKIN AROUND BELLY DRAIN VALVE OPENINGS BS 500A+2; WL 148 BL0 / REMOVED CORROSION FROM EXTERNAL SKIN AT BS 500A+2 BL0 CAVITY DRAIN PER SRM 51-10-02-0G-0 STEP 15.A.(3) BLEND MEASURES 1.9'L X 1.7'W X 0.003'D. ORIGINAL MATERIAL THICKNESS IS 0.080'. BLEND IS WITHIN LIMITS PER SRM 53-00-01-1A-5 FIGURE 102 DETAIL C. APPLIED CHEMICAL CONVERSION COATING TO BLEND AREA PER AMM 51-21-41-370-802 AND RESTORED DECORATIVE FINISH PER AMM 51-21-99-300-801

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