N474DA

Part: CRANKCASE — CRACKED (ENGINE) · airframe 1,239 hrs

DURING A SCHEDULED INSPECTION AND UPON VISUAL INSPECTION A CRACK IN THE ENGINE CRANKSHAFT CASE WAS DISCOVERED.

Part: BATTERY — DISCHARGED (LT WING)

FWD LT WING OUTSIDE EMERG LIGHT INOP. REPLACED BATTERY, CKS OK.

Part: HYD LINE — LEAKING (B-HYD SYST)

AFTER TAKEOFF 'B' SYSTEM HYDRAULIC PRESSURE AND QTY WENT TO ZERO. HYDRAULIC SYSTEM LEAK OR LOSS AND B SYSTEM LEAK OR LOSS FOLLOW UP PROCEDURES ACCOMPLISHED. MAINTENANCE FOUND OUTBOARD B SYSTEM PUMP CASE DRAIN AND PRESSURE LINES CHAFFED AND LEAKING. REPLACED BOTH LINES. SEVICED HYD SYSTEM. LEAK CHECKS GOOD.

Part: SKIN — CORROSION (BS 680)

THE SKIN JUST FWD OF THE BUTT SPLICE AT STA 80 WAS FOUND TO BE CORRODED AND WAS CUT OUT. THE RESULTING CUT OUT MEASURES 4.25 X 3. THIS CUT OUT IS 3 AWAY FROM AN EXISTING EXTERNAL REPAIR AT S-28R WHICH REPAIRS A 5 X 1 CUT OUT. BOTH REPAIRS WILL BE INCLUDED IN THE NEW REPAIR. MTC IS ACCOMPLISHING THE REPAIR IN B727 SRM 53-30-3 FIG 3A WITHOUT DEVIATION EXCEPT TO TIE IN BOTH REPAIRS. DUE TO CORROSION UNDERNEATH THE EXISTING REPAIR, S-28R WILL BE REPAIRED WITH AN SRM STRINGER SPLICE.

Part: SKIN — CRACKED (NR 2 ENG INLET)

FOUND DURING B-2 LETTER CHECK, SKIN CRACKED AT S-DUCT INLET 12 O'CLOCK POSITION 3.5 IN AFT OF LIP. INSTALLED REPAIR PER M/M 54-30-0 PG 802.

Part: SKIN — DENTED (LT ELEVATOR)

FOUND DURING B-2 LETTER CHECK, LT ELEV HAS DENT AT L/E FWD OF O/B END OF TAB. INSTALLED DOUBLER PER SRM 55-20-3 FIG 5.

Part: SKIN — CRACKED (NR 7 LE SLAT)

A 2 INCH CRACK NR 7 SLAT COVE SKIN ATTACH ANGLE AT I/B UPSTOP PAD. REPAIRED PER M/M 57-54-0.

Part: BATTERY PACK — DISCHARGED (CABIN)

LT FWD OVRWING EMERG LIGHT INOP. REPLACED BATT AND RACK\M654, OPS CHKS GOOD.

Part: BATTERY — DISCHARGED (CABIN)

RIGHT OVERWING EMERGEMCY EXIT SIGNS INOP. REPLACED BATTERY PACK, CHECKS NORMAL.

Part: BATTERY — DISCHARGED (CABIN)

R1 EMERGENCY OVHD EXIT LIGHT INOP. REPLACED BATTERIES, OPS CHECK GOOD.

Part: BATTERY PACK — DISCHARGED (CABIN)

OVERWING EMERGENCY HATCH LIGHT INOP. REPLACED BATT PACK.

Part: FUEL PUMP — FAILED (NR 3 ENGINE)

NR 3 ENGINE LOST THRUST SHORTLY AFTER GEAR RETRACTION. THERE WERE NO ACCOMPANYING SOUNDS HEARD IN COCKPIT. ENGINE INSTRUMENTS INDICATED ENGINE FAILURE. NORMAL DESCENT, APPROACH AND LANDING. REPLACED FUEL PUMP, OPS CHECK NORMAL.

Part: BATTERY PACK — DISCHARGED (CABIN)

LT OVERWING EMERGENCY EXIT LIGHT SIGNS INOP. REPLACED BATTERY PACK, CKS NORMAL.

Part: WINDOW POST — CRACKED (LT COCKPIT)

FOUND A CRACK IN THE LT SIDE F-N COCKPIT WINDOW POST. REPAIRED PER S/B 737-53-0086, REV 11 IN ACCORDANCE WITH A.D. 93-05-17 AND 90-06-09.

Part: LIGHT — INOPERATIVE (CABIN)

1L EMERGENCY LIGHT INOP. REPLACED LIGHT ASSEMBLY.

Part: STIFFENER — CRACKED (LE SPAR)

FOUND 1 CRACK IN WING L/E SPAR STIFFENERS OF NR 2 O/B TRACK. REPAIRED PER M/M 57-20-21 PG 813.

Part: COVE SKIN ANGLE — CRACKED (NR 2 LE SLAT)

FOUND .25 INCH CRACK EXTENDING FROM NR 2 SLAT O/B TRACK UP STOP PAD, IN COVE SKIN ATTACH ANGLE. REPAIRED PER M/M 57-54-0 PG 816.

Part: ANGLE — CRACKED (NR 2 SLAT)

A .25 INCH CRACK EXTENDING FROM NR 2 SLAT O/B TRACK UPSTOP PAD IN COVE SKIN ATTACH ANGLE. INSTALLED DOUBLER PER M/M 57-54-0 PG 816.

Part: BRACKET — CRACKED (NR 7 LE SLAT ACT)

FOUND NR 7 SLAT ACTUATOR CRACKED I/B BRACKET UPPER LOBE. REPAIRED PER ERA 303841-14.

Part: STIFFENER — CRACKED (LE SPAR)

FOUND 1.25 INCH CRACKS AT WING L/E SPAR STIFFENERS AFT OF NR 3 SLAT I/B TRACK TWO EACH. REPAIRED BY REPLACING STIFFENERS PER M/M 57-20-21 PG 813.

Part: LIGHT — DEFECTIVE (AFT AIRSTAIRS)

AFT 3 SECTIONS OF EMERGENCY PATH LIGHTS REMAIN ON WITH SWITCH IN OFF POSITION. FOUND EMERGENCY LIGHT ASSY L622 OVER AFT STAIRS DEFECTIVE. REPLACED-OPS NML.

Part: TRANSVERSE BEAM — CRACKED (BS 1263)

CRACKS ON THE LOWER TORQUE BOX AT FS 1263. THE CRACKS ARE ON THE FORWARD RT SIDE TRANSVERSE BEAM AND THE RT VERTICAL WEB. THE RT VERTICAL WEB HAS A 1 INCH CRACK AT THE FUEL LINE CUTOUT. NORMALLY, THE FUEL LINE IS REMOVED AND THE REPAIR DOUBLER (65-17517-31, 0.032 CLAD 2024-T3) IS INSTALLED IN ONE PIECE. HOWEVER, DUE TO SCHEDULING REQUIREMENTS, IT IS DESIRABLE TO CUT THE DOUBLER AND INSTALL IT WITH THE FUEL LINE IN PLACE IN ACCORDANCE WITH FAA ALTERNATE MEANS OF COMPLIANCE LETTER DATED 19 OCTOBER 1994. THIS AREA OF THE TORQUE BOX IS THE SUBJECT OF AD 94-07-08.

Part: SKIN — CORRODED (BS 294-312)

AT LETTER CHECK IN TPA, CORROSION WAS DISCOVERED ON THE UPPER SKIN AT THE S-24R LAP JOINT THAT WARRANTED A 12.5 INCH BY 3 INCH CUT OUT, BETWEEN STA 294.5 AND STA 312 BY MTC. THIS ER/A WILL REPAIR THE DAMAGED AREA PER SRM 53-30-3 FIG 14 DETAIL 4 WITH THE VARIATION OF BLIND FASTENERS, PER DL ERA 302714-14.

Part: SIDE WALL — CRACKED (BS 277)

DURING LETTER CHECK AT TPA, TWO .25 CRACKS WERE DISCOVERED IN THE .040 2024-T3 CLAD RIGHT SIDE WALL OF THE NOSE LANDING GEAR WHEEL WELL APPROX STA 277.0. THIS ER/A PROVIDES REPAIR OF CRACK DAMAGE AND INSTALLATION OF A MOD STRAP AT DAMAGE LOCATION, AD 90-06-09 PER DL ERA 302710-14AD.

Part: WEB — CRACKED (LT TORQUE BOX)

FOUND ON A2 LETTER CK, 1 INCH CRACK IN TORQUE BOX WEB LT SIDE FWD END ALONG UPPER ROW OF RIVETS. REPAIRED PER MM 53-11-0.

Part: SKIN — CRACKED (LT ENGINE)

FOUND ON A2 LETTER CK, 1 INCH CRACK AT FASTENER NUMBER 2 ENGINE INLET OUTER SKIN LT SIDE FWD OF SADDLE PANEL. REPAIRED PER MM 54-30-0.

Part: ANGLE — CRACKED (NR 2 LE SLAT)

FOUND ON A2 LETTER CK, .25 INCH CRACK NR 2 SLAT TAI DUCT CUTOUT. REPAIRED PER MM 57-54-0.

Part: BATTERY PACK — DISCHARGED (CABIN)

LEFT LOWER AFT BODY FAIRING E-PATH LIGHT INOP. REPLACED BATTERY PACK AT APPROX ROW 23ABC. E-PATH LIGHT CKS NORMAL.

Part: SKIN — CRACKED (NR 3 LE FLAP)

A CRACK IN NR 3 L/E FLAP I/B EDGE, 1 INCH FROM LIP. FOUND DURING A-2 LTR CK TPAMM. REPAIRED PER MM 57-53-0 PG 804.

Part: BLKHD WEB — CRACKED (FS 1183)

SEVERAL CRACKS WERE FOUND IN FS 1183 BULKHEAD WEB AND STIFFENERS AFTER AIRCRAFT FAILED TO PRESSURIZE IN BOS. A 4 INCH LONG L-SHAPED CRACK WAS FOUND IN FS 1183 BLKHD WEB AT LBL 46.9 AND WL 213.67. THE LBL 46.93 VERTICAL STIFFENER HAD MULTIPLE CRACKS WITH MAXIMUM LENGTH OF 8 INCHES BETWEEN WL 205 AND WL 215. THE WL 209 HORIZONTAL STIFFENER WAS FOUND CRACKED AT LBL 46 AND LBL 27, MAXIMUM CRACK LENGTH WAS 3.5 INCHES. THE BLKHD WEB AT LBL 27 AND WL 209 WAS ALSO FOUND WITH A 6 INCH CRACK. REPAIRS WERE ACCOMPLISHED PER DER APPROVED DATA, DL ERA 301908-14.