Service difficulty report · Skin · Boeing 7377H4

Difficulty date
June 23, 2022
Submitted
July 27, 2022
Operation
Air carrier
Aircraft
N478WN
Make and model
Boeing 7377H4
Aircraft serial
33989
Aircraft time
60,197 hours, 35,659 cycles
Part
Skin
Condition
Corroded
Location
Fuselage
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

FUSELAGE SKIN HAS PIT BS 195 3' BELOW S-24R. / [01] APPLIED PAINT STRIPPER ON AREAS TO ACCESS AT FUSELAGE SKIN STA 195 3' BELOW STR 24R AS PER REF B737-700 AMM 51-21-11-150-810;[02] REMOVED FASTENER 1 EACH TO ACCESS TO REMOVE DAMAGE ON AREAS AS PER REF B737-700 SRM 51-40-02-0G-0;[03] REMOVED DAMAGE ON AREAS AS PER REF B737-700 SRM 51-10-02-0G-0;[04] VERIFIED 1-3.;[05] PERFORMED HFEC ON REWORKED AREA IAW NDTM PART 6;51-00-00 PROCEDURE 23. NO CRACKS.<BR>[NORTEC 600 ; B/C 166316 ; CALIB.DUE- 10/22];[06] PERFORMED HFEC HOLE PROBE INSPECTION ON REMOVED FASTENER LOCATION IAW NDTM PART 6; 51-00-00; PROCEDURE 16. NO CRACKS.;[07] PERFORMED HFEC COUNTERSINK INSPECTION ON REMOVED FASTENER LOCATION IAW NDTM PART 6; 53-30-00; PROCEDURE 3. NO CRACKS.;[08] PERFORMED UT THICKNESS ON REWORKED AREA IAW NDTM PART 4; 51-00-00 PROCEDURE 3. MINIMUM FOUND:0.055'<BR>[OLYMPUS 27MG; B/C 172139; CALIB.DUE-4/23];[09] ACCOMPLISHED DVI OF INNER AND OUTER AREA AROUND BLEND OUT REF 737-700 SRM 51-00-06-0G-0. NO OTHER DEFECTS NOTED.;[10] AFTER PERFORMED NDT ON AREAS MATERIAL FOUND 0.055' NOMINAL MATERIAL 0.070' MATERIAL LOSS 0.015' FOUND OUT OF LIMITS AS PER REF B737-700 SRM 53-00-01-1A-1 FIG 103 A-A AND FIG 104;[11] VERIFIED 10.;[12] FOUND EXISTING DENT LOCATED AT 1.7' FROM THE PERIPHERY OF THE BLEND OUT; DENT EVALUATED ON FAULT TTG8Q00D21FG;[13] VERIFIED 12.;[14] ACCOMPLISHED EA 22-153-01900.;[15] VERIFIED STEP 14

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