Service difficulty report · Skin · Boeing 737824

Difficulty date
May 21, 2025
Submitted
June 3, 2025
Operation
Air carrier
Aircraft
N78501
Make and model
Boeing 737824
Aircraft serial
31602
Aircraft time
57,233 hours, 21,580 cycles
Part
Skin
Part number
182A4001
Condition
Cracked
Location
Zone 300
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

ONE CRACK SIGNAL NOTED L=0.600INCH APROX. AT STAB RH SIDE STA147.90 AND 8.500 INCH FROM FWD SPAR. PERFORMED REPAIR AT STAB RH SIDE STA 147.90 ABD 8.500 INCH FROM FWD SPAR IAW SRM 51-40-02-0G-0,SRM-55-10-01-2R-11,SRM 51-10-02-0 G-0, NDT PART 6, 51-00-00 PROCEDURE 23 AND SOPM 20-30-03 THIS RE PAIR IS A CATEGORY "B" REPAIR AND REUIRE REPTETITIVE INSPECTIONS ADD EMP:V947261 , INSPECTION THRESHOLD 56,000 TOTAL FLIGHT CYCLES, REPEAT INSECT IONS INTERVAL 9,000 FLIGHT CYCLES IAW SRM 55-10-01-2R-11 STEP (5 ) INSPECTION REQUIREMENTS TABLE 204. INSPECTION APPROVED REPAIR IAW SRM 55-10-01-2R-11 IS A CATEGORY B REPAIR WITH AN INS PECTION THRESHOLD OF 56,000 TOTAL FLIGHT CYCLES. CURRENT FC'S = 21,579. INSPECTION METHOD: DETAILED VISUAL INSPECTION TO THE EXT ERNAL DOUBLER AND EXTERNAL LOW FREQUENCY EDDY CURRENT REF. 737 N DT PART 6, 51-00-26, FIGURE 1. LFEC INSPECT THE SKIN UNDER THE E XTERNAL DOUBLER AND INSPECT THE SPAR CHORD UNDER THE EXTERNAL DOUBLER. REPEAT INSPECTIONS REQUIRED EVERY 9,000 FLIGHT CYCLES. REPAIR PERFORMED ON RH STABILIZER AT STA 147.90 AND 8.5 INCHES FROM FWD SPAR IAW SRM 55-10-01-2R-11. IAW SRM 55-10-01-2R-11 PART 5 TABLE 204