Service difficulty report · Skin · Boeing 737900ER

Difficulty date
February 24, 2023
Submitted
February 27, 2023
Operation
Air carrier
Aircraft
N39418
Make and model
Boeing 737900ER
Aircraft serial
33456
Aircraft time
46,862 hours, 16,414 cycles
Part
Skin
Part number
148A359515
Condition
Gouged
Location
R Hori Stab
Stage of operation
IN
How discovered
O
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

RH FUSE SKIN IS DEEPLY GOUGED JUST AFT OF RH HORIZONAL STAB UPR MOVEABLE SEAL TRACK. GRID MAPPED DAMAGED AREA. LENGTH AND WIDTH ARE 1.00" X 0.50" BLENDED DAMAGED AREA. REF SRM 53-80-01. ACP''D HFECPER NDT PT6, 51-00-00-23, NO CRACKS NOTED. AND MAX DEPTH IS 0.038". PERFORMED MATERIAL THICKNESS CHECK PER 737 NTM PART 4 51-00-00 PROCEDURE 3. MEASURENTS RECORDED ON GRID ENGINEERING SHEET. PARTS USED: ,QTY :1 ACP''D DVI AND HFEC INSPECTION PER AVO 10444 ITEMS A2, A3, A4, AND A5. GENERATED LP 3827262, 3827349, AND 3827369. DAMAGED SKIN HAS NOT BEEN TRIMMED OUT. DVI FOUND NO ADDITIONAL INTERNAL DAMAGES. VERIFIED .063 2024-T3. CLAD. P.O. 83102700141 AND ALSO VERIFIED -3 REPLACMENT FILLER SKINFABICATE FROM .100 2024-T3 CLAD .P.O. 116444330. TRIMED OUT DAMAGE FUSELAGE SKIN SECTION AS SHOWN IN FIG. 5 REF. MATERIAL VERIFICTION OF -1 DOUBLER AND -2 TRIPLER. FABRICATE ACP''D HFEC ON FUSELAGE CUT OUT PER NDT PT6, 51-00-00 -23, NO AVO# 10444 REV.A, STEP: A.1. READY FOR HFEC INSPECTION OF TRIM FROM .063 2024-T3. CLAD. P.O. 83102700141. CRACK INDICATIONS NOTED. OUT EDGES. MATERIAL VERIFICATION OF -3 REPLACMENT FILLER SKINFABICATE FROM .100 2024-T3 CLAD .P.O. 116444330. INSPECTED PERFORMED ADDITIONAL INSURANCE CUT OUT BY .040 OF FUSELAGE SKIN AT DAMAGE AREA REF. AVO# 10444 REV.A, STEP: A.1.(A) DESCREPANCY LOG PAGES GENERATED LP 3827262, 3827349, AND 3827369 PERFORMED ADDITIONAL INSURANCE CUT OUT BY +.040 OF FUSELAGE SKIN HAVE BEEN WORKED AND CLEARED AT DAMAGE AREA REF. AVO# 10444 REV.A

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