COBB AVIATION SERVICES INCORPORATED

Operated by COBB AVIATION SERVICES INCORPORATED (per NTSB report)

NR 1 ENGINE ENGINE CONTINUOUS ERRATIC AT ALT EPR - N1 - N2 TEMP DECREASING AND SURGING. RETURNED FOR LANDING HOUSTON. REPLACED NR 1 ENG FUEL FILTER AND DID FIND CONTAMINATION. REPLACED 2 AND 3 ENG FILTERS PRECAUTIONARY PER 73-11-01, 405. PERFORMED ENG RUN PER 71-00-501, CHECKS OK.

WING CENTER SECTION LWR SKIN CORROSION, LT PRIMARY HEAT EXCHANGER PLENUM AREA. REMOVED CORROSION AND FOUND OUT OF LIMITS IAW B727 SRM 57-30-1 FIG 4. REPAIRED IAW CHAMPION AIR, EO-727-5710-05.

CORROSION ON SEAT TRACK RBL 25-BS 400 - 420. REMOVED AND REPLACED SEAT TRACK RBL 25 BS 400 - 420 IAW B727 SRM 53-10-2 AND 53-10-5 FIG 7.

CORROSION ON FLOORBEAM BS 380 BL O TO RBL 45. FABRICATED REPAIR FOR FLOOR BEAM BS 380 BL-O TO RBL - 45- AND INSTALLED IAW B727 53-10-8 FIG 3.

CORROSION ON SEAT TRACK BS 344 -480 LBL 25. REMOVED AND REPLACED SEAT TRACK BS 344 - 480 LBL 25 IAW B727 SRM 53-10-2 AND 53-10-5

BS 1183 VERT FRAME RBL 35 WL 233 CRACK IN AFT RADIUS. STOP DRILLED CRACK AND INSTALLED REPAIR PARTS PER S/B 727-53-0192 REV 1 DATED 5/30/91.

CORROSION SEAT TRACK BS 344 - 480 LBL 45. REMOVED AND REPLACED SEAT TRACK BS 344 - 480 LBL 45 IAW B727 SRM 53-10-2 FIG. 7 AND 53-10-5

CRANKSHAFT GEAR FAILURE. GEAR TEETH WORN OUT .5 WIDTH, CAUSED ENGINE FAILURE WHEN DRIVEN GEAR LOST CONTACT. (K)

CRANK SHAFT GEAR FAILURE. GEAR TEETH WORN OUT (.5) WIDTH CAUSED ENGINE FAILURE WHEN DRIVEN GEAR LOST CONTACT. (K)

CSD LOW OIL PRESSURE LIGHT ILLUMINATED W/ NR 2 CB ILLUMINATED. CSD OIL TEMP OFF SCALE HIGH IN THE IN POSITION. RESIDUAL VOLTS 55. PERFORMED COM 2.24.15 AND 2.26.2 PRECAUTION ENGINE SHUTDOWN. REMOVED AND REPLACED NR 2 CSD IAW 24-10-11. REMOVED AND REPLACED NR 2 CSD OIL COOLER IAW 24-10-61. REMOVED AND REPLACED GEN DRIVE LINE OIL FILTER AND FLUSHED OIL LINES IAW 24-10-31. ALL OPS NORMAL.

AFTER T/O STL, UPON GEAR RETRACTION LEFT MAIN GEAR DOOR LIGHT STAYED ILLUMINATED. LEFT MAIN GEAR LIGHT WOULD GO OUT INITIALLY THEN COME BACK ON. CLIMBED TO 8000 FT, DUMPED APPROX 17,900 LBS FUEL. RAN CHECK LIST IN ACCORDANCE WITH COM AND RETURNED TO STL, NORMAL LANDING. JACKED A/C, SWUNG GEAR SVERAL TIMES, INSP LANDING GEAR FOR EVIDENCE OF DAMAGE, FOUND LT MAIN DOOR ACTUATOR BRACKET RUBBING ON DOOR ROD. INSTALL SHIM PER MM 32-12-01, N/R 1 ALSO FOUND HISTORY OF LANDING GEAR ACCESSORY UNIT FOR LT GEAR DOOR LIGHT PROBLEMS. INSTALLED NEW UNIT PER MM 32-09-121. CYCLED LANDING GEAR SEVERAL TIMES PER MM 32-32-00, ALL LIGHTS WORK OK.

DURING FLIGHT THE NR2 (B) SYSTEM HYDRAULIC LOW PRESSURE LT ILLUMINATED FOLLOWED BY THE B SYSTEM NR 1 LOW PRESSURE LT ILLUMINATING AND LOSS OF B SYSTEM HYDRAULIC PRESSURE , THE B SYSTEM QUANTITY GUAGE INDICATED FULL THE ENTIRE FLIGHT. HYDAULIC BRAKE PRESSURE REMOVED AND REPLACED BOTH NR 1 AND NR 2 B- SYSTEM PUMPS CASE DRAIN AND PRESSURE FILTERS DURING LEAK CHECK FOUND NR 2 B PUMP PRESSURE LINE CRACKED REMOVED. REMOVED AND INSTALLED FLEX LINE IAW MM 29-12-11. LEAK CHECK OK.

PERFORMED W/S ESCAPE MANUEVER AT MAF (ARRIVAL) WITH FIREWALL POWER ON ALL 3 ENGINES. NO ENGINE LIMITATIONS WERE EXCEEDED. PERFORMED INSPECTION OFF ALL ENGINES INLET AND EXHAUST PER B727 MM 72-00-00. NO DAMAGE FOUND. A/C OK FOR SERVICE.

WHILE PERFORMING AD 2005-19-24, FOUND NR 1 ENG PYLON FIREWALL ATTACH ANGLE P/N 69-16977-1 CRACKED NEXT TO MOUNT FITTING. REMOVED AND INSTALLED ATTACH ANGLE P/N 69-16977-1 REF BOEING PRINT 65-72772.

CLIMBING THROUGH FL290, NOTICED CABIN ALTITUDE RAPIDLY CLIMBING, ALTITUDE HORN THEN CAME ON, COULDN'T CONTROL CABIN, PERFORMED COM PROCEDURE 2.21.5 & THEN PERFORMED COM PROCEDURE 2.21.3. MAINTENANCE IS CURRENTLY TROUBLESHOOTING SYSTEM.

U-CHANNEL SUPPORT IS CRACKED ON AFT SIDE OF WEB INSIDE OF RT LOWER TORQUE BOX, STA 1263 + 10 IN. REMOVED AND REPLACED DAMAGED BEAM P/N 65-17518-8, PO 531836 AT RT LWR TORQUE BOX AT ACTUATOR SUPPORT FITTING IAW SB 727-53-0129 REV 5 FIG 4 RII ACCOMPLISHED.

L-ANGLE SUPPORT IS CRACKED AT UPPER INBOARD CORNER OF RIGHT LOWER TORQUE BOX, STA 1263 + 10 INCHES. REMOVED AND REPLACED DAMAGED ANGLE P/N 65C13874-4 PO 3146138 AND FILLER P/N 65C13874-5 PO 3146132 AT RIGHT LOWER TORQUE BOX AT ACTUATOR SUPPORT FITTING IAW SB 727-53-0129 REV 5 FIG 4.

AFT CARGO DOOR HAS CRACK ABOVE THE FWD BLOW OUT PNL BS 950E INNER SKIN. CUT OUT DAMAGED AREA DIM 2 X .5 INCH AND FABBED DOUBLER FROM 7075T6 .050 PO 9002507 DIM 3.5 X 3 INCHES IAW 727 SRM 52-30-1 FIG 5 AND 51-40-2 FIG 1. DOUBLER TREATED, PRIMED AND INSTALLED IAW 727 SRM 51-40-2 FIG 1.

FRAME DENTED IN FWD CARGO PIT STA 680 OVER STRINGER 25R, MARKED. CUT OUT DAMAGED AREA DIM 1.375 X .875 INCHES AND FABBED ANGLE REPAIR FROM 7075T6 .063 PO9002507 DIM 15.75 X 3.75 IAW 727 SRM 53-10-2 FIG 5 AND 51-40-3 FIG 1. ANGLE TREATED AND PRIMED INSTALLED IAW 727 SRM 51-10-2 AND 51-40-3 FIG 1.

FRAME DENTED IN FWD CARGO -B- STA 660 OVER STRINGER 26R, MARKED. CUT OUT DAMAGED AREA DIM 2.125 X 1 INCH, FABBED REPAIR ANGLE FROM 7075T6 .063 PO 9002126 DIM 13 X 4 INCHES IAW 727 SRM 53-10-2 FIG 5 AND 51-40-3 FIG 1. REPAIR ANGLE TREATED AND PRIMED INSTALLED IAW 727 SRM 51-10-2 AND 51-40-3 FIG 1.

RIGHT MLG KEELBEAM INBOARD SIDE VERTICAL STIFFENER IS CRACKED STA 870 (MARKED). REMOVED AND REPLACED DAMAGED VERTICAL STIFFENER BS 870 AT KEEL BEAM IAW 727 SRM 51-30-2 P/N 65-18036-378 PO 53185.

CRACK ON FRAME AT BS 804 STR 15R. CUT OUT DAMAGED SECTION, FABBED NEW FILLER AND SPLICE ANGLE FROM 7075T6 .090 PO 294560 DIM FILLER 6.5" X 1" X 1" AND SPLICE 11.75 X 1 X 1, TREATED, PRIMED AND INSTALLED IAW 727 SRM 51-10-2 AND 51-40-3 FIG 1 RII ACCOMPLISHED.

FRAME DENTED IN FWD CARGO PIT OVER BS 680 OVER STRINGER 25R, MARKED. CUT OUT DAMAGED AREA 1.75 X .75 INCH AND FABBED REPAIR DOUBLER FROM 7075T6 .063 PO 9002351 DIM 9.75 X 3.75 INCH IAW 727 SRM 53-10-2 FIG 5 AND 51-40-3 FIG 1. REPAIR ANGLE TREATED AND PRIMED AND INSTALLED IAW 727 SRM 51-10-2 AND 51-40-3 FIG 1.

BS 463 BETWEEN 15RT-16RT STRINGERS HAS LARGE PROTRUDING DENT OIL CANNING. DAMAGE OUT OF LIMITS IAW 727 SRM 53-30-1 FIG 1, CUT OUT DAMAGED AREA, FABBED FILLER FROM 2024 T3 .040 PO 9002416 DIM 4.375 X 4.5 INCH, DOUBLER FROM 2024 T3 .050 PO 9002507 DIM 14.25 X 10.875 INCH IAW SRM 53-30-2 FIG 1 AND 53-30-3 FIG 4, REPAIR PARTS TREATED, PRIMED AND INSTALLED IAW 727 SRM 51-10-2 AND 53-30-3 FIG 4.

FRAME DENTED IN FWD CARGO PIT STA 700 OVER STRINGER 25R, MARKED. CUT OUT DAMAGED AREA DIM 3 X .625 INCH AND FABBED REPAIR ANGLE FROM 7075T6 .063 PO 9002351 DIM 11 X 3. .875 INCH IAW 727 SRM 53-10-2 FIG 5 AND 51-40-3 FIG 1. ANGLE TREATED, PRIMED AND INSTALLED IAW 727 SRM 51-10-2 AND 51-40-3 FIG 1.

RIGHT MLG WW LOAD APU CONTROL VALVE CUT OUT HOLE ON STA 870, WEB IS CRACKED. CRACK STOP DRILLED IAW 727 SRM 51-10-1. FABBED AND INSTALLED 2 EA DOUBLERS FROM 301 1/2 HD .050 PO 9912793 DIM 12 X 11 INCHES AND 18.5 X 21 INCHES IAW 727 SRM 53-10-9 FIG 5.

RIGHT LOWER TORQUE BOX HAS CRACK AT LIGHTNING HOLE WITH STOP DRILL HOLE, STA 1243 +6 IN. ROUTED OUT DAMAGED AREAS, FABBED DOUBLER FROM 7075 T6 .032 PO 900573 DIM 10 X 2 INCHES IAW 727 SRM 53-10-2 FIG 6 AND 51-40-2 FIG 1. DOUBLER TREATED AND PRIMED AND INSTALLED IAW 727 SRM 51-10-2 AND 51-40-3 FIG 1.

U-CHANNEL SUPPORT IS CRACKED ON FWD SIDE OF WEB INSIDE OF RIGHT LOWER TORQUE BOX, STA 1263 + 10 INCHES. REMOVED AND REPLACED DAMAGED GUSSET P/N 69-67881-1 PO 5070544 AND STIFFENER P/N 65-17518-15 PO 531824 AT RIGHT LOWER TORQUE BOX AT ACTUATOR SUPPORT FITTING IAW SB 727-53-0129 REV 5 FIG 4.

SUPPORT CLIP ON STR 16R CRACKED AT BS 850. REMOVED DAMAGED SPLICE ON STR 16R AT BS 850 IAW 727 SRM 51-30-2. FABBED NEW SPLICE FROM BAC 1498-137 PO 4496178 DIM 6 INCHES IN LENGTH IAW 727 SRM 53-10-2 FIG 9. SPLICE TREATED, PRIMED, AND INSTALLED IAW 727 SRM 51-10-2 AND 51-30-2.

FWD CARGO PIT, HAS FRAME 520 DENTED ON STR 26R. DAMAGED AREA OUT OF LIMITS IAW 727 SRM 53-10-1 FIG 1. CUT OUT DAMAGED AREA BS 520 FRAME BETWEEN STR 25R AND 26R DIM 2 X 1 INCH, FABBED REPAIR ANGLE FROM 7075T6 .063 PO 9002351 DIM 9.25 X 4 INCH, TREATED, PRIMED, AND INSTALLED IAW 727 SRM 51-10-2, 53-10-2 FIG 5, 51-40-3 FIG 1.

FWD CARGO PIT HAS FRAME DENTED AT STA 520 STR 25R (MARKED). DAMAGED AREA OUT OF LIMITS IAW 727 SRM 53-10-1 FIG 1. CUT OUT DAMAGED AREA BS 520. FRAME BETWEEN STR 25R-26R DIM 2 X 1 INCH AND FABBED REPAIR ANGLE FROM 7075T6 .063 PO 9002351 DIM 9.25 X 4 INCHES, TREATED PRIMED, AND INSTALLED IAW 727 SRM 51-10-2, 53-10-2 FIG 5 AND 51-40-3 FIG 1.

AFTER DEPARTURE, RIGHT PACK TRIPPED FOLLOWED BY NR 3 BLEED TRIP. TRIPPED AGAIN COM 21.15 AND 2.36.2 AFTER COM PROCEDURE. REMOVED AND REPLACED RT HIGH PRESSURE REGULATOR PER M/M 36-12-51, OPS CHECK NORMAL PER M/M 36-12-01.

A/C PRESSURIZATION, WOULD NOT HOLD PRESSURIZATION ABOVE 15000 ON ONE PACK WITH CARGO HEAT OUTFLOW CLOSED. FOUND GATE SEALS ON THE L1 AND L2 DOORS NOT SECURED. SECURED SEAL IAW MM 52-11-71 PERFORMED ADJ/TEST IAW MM 21-31-00 OPS CK OKAY.

ON TAKEOFF, UNABLE TO MOVE GEAR HANDLE FROM DOWN TO UP ON FIRST ATTEMPT. SECOND ATTEMPT NORMAL, REMOVED AND REPLACED LANDING GEAR CONTROL LEVER LOCK SOLENOID IAW MM 32-31-16. OPS CHECK WAS GOOD IAW MM 32-31-16.

UPON APPLING TAKEOFF POWER AT 20 KNOTS. RIGHT PACK TRIPPED OFF. ABORTED AND RETURNED TO GATE. LOW SPEED INSPECTED AND RESCHEDULED PER MEL 21-1-1 CAT C06019. INFORMED MXC PLACARDS INSTALLED. (ITEM RESOLVE UNDER MDDR: C06019) REPLACED FLOW CONTROL MOD AND S/O VALVE PER M/M 36-12-61. OPS GOOD. REMOVED FROM MEL.

COMPRESSOR STALL NR 2 ENGINE ON THROTTLE ADVANCE AT 1.4 EPR TEMPS NORMAL. ALL PARAMETERS NORMAL WIND WAS A CROSSWIND, RUNWAY 25R = WIND WAS 180 AT 14 GUSTING TO 19 INSPECTED INLET AND EXHAUST NR 2 ENG. NO DISCREPANCIES NOTED. RAN ENG TO 1.4 EPR - INTO WIND, NO STALL NOTED. PARAMETERS NORMAL. REF MM 71-00.

ENGINE NR 3 BLEED AIR TRIP LIGHT ILLUMINATED PERFORMED COM PROCEDURE 2.36.2. REMOVED AND REPLACED NR 3 ENGINE BLEED VALVE OPS CHECKS NORMAL IAW MM 36-10-01 OK TO CONTINUE SERVICE.

ENGINE NR 3 FIRE WARNING GRD FAULT DETECTION LIGHT ILLUMINATED IN FLIGHT PERFORMED ENG FIRE TEST A OR B SYSTEM FAULT DETECTOR PER COM 2.26.24 TEST PROCDURE TESTED NORMAL. INSPECTED AND RESCHEDULED PER MEL 26-9 CTL C05478 ASSIGNED CAT 'C' ITEM PLACARDS INSTALLED (ITEM RESOLVE UNDER MDDR: C05478) T/S FOUND FIRE LOOP GROUNDING TO COWL TOWARDS AFT OUTBOARD SIDE REPOSITION NR 3 FIRE LOOP. OPS CHECKED PER CHAMPION M/M 26-11 CLEARS MEL 26-9 C/N C05478 MXC NOTIFIED REMOVED PLACARDS.

NR 3 GROUND FAULT ILLUMINATED IN FLT. COMP WITH COM PROCEDURE INSPECTED AND RESCHEDULED PER MEL 26-9, CAT-C, C/N C05473. MC NOTIFIED, PLACARDS INSTALLED. (ITEM RESOLVE UNDER MDDR: C05473). REPOSITION NR 3 ENG FIRE LOOP IAW B727 MM REF 26-11. OK FOR SERVICE, THIS CLEARS MEL 26-9 C/N C05473. MX CONTROL NOTIFIED PLACARDS.

L-2 AND R-2 DOOR EMERGENCY SLIDE LIGHTS ARE INOP. REMOVED AND REPLACED BATTERY PACK AND POWER SUPPLY. OPS CHECK WAS GOOD. REF: 727 MM 33-50-51.

CAPT'S AIR DATA COMPUTER FAILED IN FLIGHT. ADVISED COMPANYVIA AIRINC. DIVERTED TO DFW. REPLACED NR 1 ADC PER M/M 34-12-11. OP'S. CHECK GOOD. RII NOT REQUIRED. QUICK DISCONNECTS INSTALLED BY VENDOR PER 12-12-00.

LT INBOARD AILERON TAB MOUNT, CENTER AND OUTBOARD FITTINGS CRACKED.

CORROSION ON FLOORBEAM BS 440 LBL 21 TO RBL 15.

FLOOR T-ANGLE CORRODED BS 305 RBL 40.

CORROSION ON INTERCOSTAL BS 305 RBL 40.

SEAT TRACK CRACKED AT BS 960 LBL 45.

CORROSION ON FLOORBEAM FS 344 LBL 58 RBL 58.

CORROSION ON SEAT TRACK LBL 45 BETWEEN FS 1010 AND 1110.

CORROSION ON FLOORBEAM AT FS 1110 BETWEEN LBL 45 AND RBL 55.

CORROSION ON SEAT TRACK FS 344 / 360 LBL 24.