N13067
Operators of this aircraft
Who operated this tail, and how firmly we know it.
No operator established for this aircraft.
Accident & incident history
No NTSB accidents or incidents on file for this aircraft.
Maintenance disclosures
Service Difficulty Reports filed with the FAA for this airframe. Filing is largely voluntary — the number of reports is not a measure of reliability. To verify a report, search its control number at the FAA SDRS site.
62 reports on file, 1995-11-25 – 2000-06-08.
Part: CHANNEL — CRACKED (FUSELAGE) · airframe 93,799 hrs · 20,768 cycles
THE FORWARD CARGO COMPARTMENT LEFT LOWER SIDEWALL Z-CHANNEL FORWARD OF LOAD BAR HAD A 12 INCH CRACK AND PUNCTURE ON LT LOWER SIDEWALL TRIM PLATE. AN INTERIM REPAIR HAD PREVIOUSLY BEEN INSTALLED IAW ECRA 5320-00164 AND PLACED ON A DIP. A PERMANENT REPAIR WAS INSTALLED BY REMOVING THE CHANNEL AND INSTALLING A NEW ONE IAW SRM 51-31-01.
Part: WEB — CRACKED (FUSELAGE) · airframe 93,799 hrs · 20,768 cycles
INSPECTION FOUND A 3 INCH CRACK ON VERTICAL WEB IN AFT CARGO COMPARTMENT AT STA 1841 ABOVE LONGERON 43-44, LBL 65. THE CRACKED AREA WAS TRIMMED OUT AND REINFORCED WITH A NEW WEB AND DOUBLER IAW SRM 53-00-01, FIGURE 4 & 5 AND 51-31-01.
Part: ANGLE — CRACKED (LT MLG WW) · airframe 93,799 hrs · 20,768 cycles
INSPECTION FOUND A 1 INCH CRACK IN ANGLE ON OUTER DOOR CUTOUT AFT SIDE FORWARD EDGE, LT MLG WHEEL WELL. THE ANGLE WAS REMOVED AND A NEW ANGLE WAS INSTALLED IAW SRM 51-31-01 AND 57-53-01.
Part: FITTING — CORRODED (DOOR JAMB) · airframe 93,799 hrs · 20,768 cycles
INSPECTION FOUND FORWARD CARGO DOOR JAMB FORWARD FITTING CORRODED. THE FITTING WAS REMOVED AND A NEW FITTING WAS INSTALLED IAW SRM 53-50-00, FIGURE 1, 51-21-01, AND 51-31-01.
Part: SKIN — CRACKED (LT WING) · airframe 93,799 hrs · 20,768 cycles
INSPECTION FOUND A 6 INCH CRACK IN LT WING LOWER SURFACE ON I/B CORNER OF FUELING BAY DOOR CUTOUT. THE AREA WAS REINFORCED WITH A DOUBLER USING RIVETS IAW SRM 57-10-00, FIGURE 68 AND 51-31-01.
Part: INTERCOSTAL — CORRODED (FUSELAGE) · airframe 93,799 hrs · 20,768 cycles
INSPECTION FOUND INTERCOSTAL CORRODED IN CENTER CARGO COMPARTMENT AT STA 1740, LONGERON 45R. THE CORRODED AREA WAS REMOVED AND A REPAIR WAS INSTALLED IAW SRM 53-00-01, FIGURE 8 AND 51-31-01.
Part: STRINGER — CRACKED (FUSELAGE) · airframe 93,799 hrs · 20,768 cycles
INSPECTION FOUND STRINGERS NR 4, 5, AND 7 CRACKED IN RT MAIN GEAR WHEEL WELL AT O/B LOWER WALL AFT OF OUTER DOOR CUTOUT. THE CRACKS WERE 1, 4, AND 5 INCHES LONG. THE CRACKED AREAS WERE REMOVED AND REINFORCED WITH ANGLES IAW SRM 53-00-01, FIGURE 2 AND 51-31-01.
Part: SKIN — CORRODED (FUSELAGE) · airframe 93,799 hrs · 20,768 cycles
INSPECTION FOUND EXTERNAL FUSELAGE SKIN CORRODED AT STA 900 BETWEEN LONGERON 37L AND 38L. THE CORRODED AREA OF SKIN WAS TRIMMED OUT. THE AREA WAS REINFORCED WITH A DOUBLER AND FINGER DOUBLER USING RIVETS IAW SRM 53-20-00 AND 51-31-01.
Part: LIGHT — INOPERATIVE (SEAT 9) · airframe 93,799 hrs · 20,768 cycles
INSPECTION FOUND CABIN EMERGENCY LIGHT ASSEMBLY AT SEAT 9B INOPERATIVE. THE LIGHT ASSEMBLY WAS REPLACED AND OPERATION CHECKED GOOD IAW MM 33-50-00.
Earlier reports · 1995–1999 · 53 reports
1999
Part: OVEN — INOPERATIVE (GALLEY)
SMOKE BEGAN COMING OUT OF THE AFT GALLEY OVEN CONTROL PANEL WHILE EN ROUTE TO EWR. THE SMOKE STOPPED WHEN OVEN WAS TURNED OFF. THE FLIGHT CONTINUED WITHOUT FURTHER PROBLEM. MAINTENANCE FOUND NO EVIDENCE OF FIRE. THE AFT GALLEY OVEN WAS REMOVED AND REPLACED. OPERATION OF THE OVEN CHECKED GOOD. NO OTHER DEFECTS WERE FOUND.
Part: WIRE — BROKEN (ROW 2KL)
INSPECTION FOUND FORWARD EMERGENCY LIGHT AT SEAT 2KL INOPERATIVE. INSPECTION REPAIRED BROKEN WIRE AT SEAT 2KL AND OPERATION CHECKED GOOD.
Part: ANGLE — CRACKED (LT MLG WW)
INSPECTION FOUND TWO VERTICAL STIFFENER ANGLES ON LT WHEEL WELL AFT SIDE WEB CRACKED. THE CRACKS WERE .5 INCH LONG. THE TWO ANGLES WERE REMOVED AND NEW ANGLES WERE INSTALLED IAW SRM 51-31-01.
Part: ANGLE — CRACKED (BS 1120)
INSPECTION FOUND A 1 INCH CRACK IN FUSELAGE SKIN ATTACH ANGLE AT STA 1120, STRINGER 33-34R. THE ANGLE WAS REMOVED AND A NEW ANGLE WAS INSTALLED IAW SRM 51-31-01.
Part: FRAME — CRACKED (BS 1841)
INSPECTION FOUND A 2 INCH CRACK IN FRAME OF CENTER CARGO COMPARTMENT VERTICAL WALL AT STA 1841, RBL 20. THE CRACKED AREA WAS TRIMMED OUT AND REINFORCED WITH DOUBLER IAW SRM 53-00-01, FIGURE 4 AND 51-31-01.
Part: LINER — TORN (BS 1841)
INSPECTION FOUND A 2 INCH TEAR ON VERTICAL WALL IN CENTER CARGO COMPARTMENT AT STA 1841, RBL 10. THE TORN AREA WAS TRIMMED OUT AND REINFORCED WITH DOUBLER IAW SRM 53-00-01, FIGURE 4, 51-21-01, AND 51-31-01.
Part: SUPPORT — CORRODED (BS 1920-2007)
INSPECTION FOUND CABIN FLOOR SUPPORT CORRODED BETWEEN STA 1920 AND 2007, LBL 55. THE FLOOR SUPPORT WAS REMOVED AND A NEW SUPPORT WAS INSTALLED IAW SRM 51-31-01.
Part: SUPPORT — CRACKED (BS 755)
INSPECTION FOUND A 2 INCH CRACK IN FLOOR SUPPORT IN FORWARD CARGO AREA AT STA 755 BETWEEN RBL 65 AND 85. THE FLOOR SUPPORT WAS REMOVED AND A NEW SUPPORT WAS INSTALLED IAW SRM 51-31-01.
Part: SKIN — CRACKED (NR 2 LE SLAT)
INSPECTION FOUND A 1 INCH CRACK WITH SHEARED RIVETS IN RT WING NR 2 LEADING EDGE SLAT INBOARD SKIN. THE CRACKED AREA WAS TRIMMED OUT AND REINFORCED WITH DOUBLER IAW SRM 57-00-01, FIGURE 4. THE RIVETS WERE REPLACED WITH NEW RIVETS IAW SRM 51-31-01.
Part: SUPPORT — CORRODED (BS 420)
INSPECTION FOUND FLOOR SUPPORT CORRODED UNDER LAV/GALLEY FLOOR AREA AT STA 420 BETWEEN BL 0 TO LBL 27. THE FLOOR SUPPORT WAS REMOVED AND A NEW SUPPORT WAS INSTALLED IAW SRM 51-21-01.
Part: SUPPORT — CRACKED (BS 899)
INSPECTION FOUND A 1 INCH CRACK IN FLOOR SUPPORT IN FORWARD CARGO AREA AT STA 899, RBL 45-65. THE FLOOR SUPPORT WAS REMOVED AND A NEW ONE WAS INSTALLED IAW SRM 51-31-01.
Part: ANGLE — CRACKED (RT MLG WW)
INSPECTION FOUND A 1 INCH CRACK IN STIFFENER VERTICAL ANGLE AT RT MLG WHEEL WELL REAR BULKHEAD LOWER O/B CORNER JOINT TO LONGERON TO BULKHEAD. THE ANGLE WAS REMOVED AND A NEW ANGLE WAS INSTALLED IAW SRM 51-35-02 AND 51-33-01, FIGURE 1.
Part: STRINGER — CORRODED (BS 1851)
INSPECTION FOUND FRAME CORRODED IN LOWER LOBE AFT CARGO BILGE AREA AT STA 1851 BETWEEN STRINGER 51L AND 51R WITH CORROSION ON STRINGERS 52L AND 51L. THE CORRODED AREA ON FRAME WAS CLEANED AND TREATED IAW SRM 51-21-00. THE CORRODED SECTIONS OF STRINGERS WERE REMOVED. NEW STRINGER SECTIONS WERE INSTALLED IAW SRM 51-33-01 AND 53-10-00, FIGURE 2.
Part: ANGLE — CRACKED (BS 1841)
INSPECTION FOUND A 2 INCH CRACK ON VERTICAL ANGLE IN CENTER CARGO COMPARTMENT AT STA 1841, LBL 10. THE ANGLE WAS REMOVED AND A NEW ANGLE WAS INSTALLED IAW SRM 51-31-01.
Part: WALL — TORN (BS 1841)
INSPECTION FOUND TEARS ON VERTICAL WALL IN CENTER CARGO COMPARTMENT AT STA 1841 BETWEEN LBL 40 & 60. THE TORN AREAS WERE TRIMMED OUT AND DEBURRED. REINFORCED AREAS WITH DOUBLER IAW SRM 53-00-01, FIGURE 4 AND INSTALLED RIVETS IAW SRM 51-33-01.
Part: FRAME — CORRODED (BS 1741 & 1761)
INSPECTION FOUND CORROSION ON BOTH LOWER SIDES OF FRAME AT STA 1741 AND 1761 BETWEEN STRINGER 47L AND 50R. THE CORRODED AREAS WERE REMOVED, NEW ANGLES WERE INSTALLED IAW SRM 51-31-01.
Part: STRINGER — CORRODED (BS 1851-1868)
INSPECTION FOUND STRINGER 50 CORRODED BETWEEN STA 1851 AND 1868. THE CORRODED SECTION WAS REMOVED, A NEW SECTION OF STRINGER WAS INSTALLED WITH REINFORCEMENT IAW SRM 51-31-01 AND 53-10-00, FIGURE 2.
Part: SUPPORT — CORRODED (BS 755-899)
INSPECTION FOUND FLOOR SUPPORT UNDER LAV/GALLEY AREA CORRODED AT STA 755-899, LBL 44. THE CORRODED FLOOR SUPPORT SECTION WAS REMOVED AND A NEW SECTION WAS INSTALLED AND REINFORCED IAW SRM 53-70-00, FIGURE 13.
1998
Part: APU — LEAKING (AFT FUSELAGE)
OIL SMELL IN COCKPIT. APU INTERNAL OIL LEAK CONFIRMED. CLEANED AIRCRAFT PACKS. PLACARD APU PER MEL.
Part: COMPUTER — INOPERATIVE (NR 1)
THE CAPTAIN'S STICK SHAKER ACTIVATED, THE SLAT DISAGREE LIGHT ILLUMINATED, AND SLAT RESET ILLUMINATED DURING TAKEOFF FROM IAH. CONFIRMED SLAT RETRACTION PER CHECKLIST AND THE AIRCRAFT WAS RETURNED TO IAH WHERE IT LANDED WITHOUT INCIDENT. MAINTENANCE FOUND THE NR 1 STALL WARNING SYSTEM NOT TESTING FROM COCKPIT. THE NR 1 AUTOTHROTTLE COMPUTER WAS REMOVED AND REPLACED. IN ADDITION, THE NR 1 STALL WARNING ANGLE OF ATTACK TRANSDUCER WAS REMOVED AND REPLACED AS A PRECAUTIONARY MEASURE. THE FLAP/SLAT SYSTEM WAS OPERATED AND GROUND CHECKS WERE NORMAL. AN AUTOSLAT TEST WAS ALSO PERFORMED WITH NO FAULTS NOTED.
Part: WIRE — BROKEN (NR 3 ENGINE)
NUMBER 3 ENGINE NUMBER 1 AGENT FIRE BOTTLE LOW PRESSURE SWITCH FAILED. WIRE FOUND BROKEN AT EARTH POINT 6015D. WIRE RETERMINATED WITH A NEW TAG PER MM20-00-00.
Part: CARTRIDGE — OPEN CIRCUIT (NR 1 ENGINE)
NUMBER 1 ENGINE FIRE BOTTLE AGENT ONE FILAMENT A NOT LIGHTING ON TEST BOX DURING TEST. CARTRIDGE FOUND U/S. INSTALLED NEW CARTRIDGE.
Part: WIRE — BROKEN (NR 2 FIRE BOTTLE)
CARGO FIRE BOTTLE NR 2 LOW PRESSURE SWITCH ELECTRICAL CONNECTOR WIRE FOUND BROKEN. WIRE W277B24 FOUND BROKEN AT PIN B OF CONECTOR P1-2189. NEW PIN FITTED AND TESTED.
Part: FIRE BOTTLE — DAMAGED (NR 2 ENGINE)
NUMBER 2 ENGINE AND APU FIRE BOTTLE LOW PRESSURE CONNECTOR P1-1264 SOCKET B FOUND PUSHED BACK. ELECTRICAL CONNECTOR REPLACED PER MM 20-00-00.
1997
Part: COMPRESSOR — DAMAGED (NR 3 ENGINE)
THE NR 3 ENGINE EXPERIENCED COMPRESSOR STALLS WHILE ENROUTE. THE AIRCRAFT WAS RETURNED TO LGW. THE NR 3 ENGINE WAS REMOVED AND REPLACED. THE ENGINE WAS RUN AND OPERATION CHECKED GOOD. *S/D* INSPECTION OF THE ENGINE FOUND THAT THE ENTIRE COMPRESSOR HAD SUFFERED EXTENSIVE DAMAGE. IN ADDITION, ONE EACH STAGE 2 BOOSTER VANE HAD SUFFERED IMPACT DAMAGE. METALLURGICAL ANALYSIS CONFIRMED FOREIGN OBJECT DAMAGE. COMPRESSOR SURGES WERE A RESULT OF EXTENSIVE DAMAGE TO THE COMPRESSOR.
Part: LONGERON — CORRODED (BS 1811)
DIP NR 017105 WAS COMPLIED WITH BY INSTALLING A PERMANENT REPAIR AT LONGERON 46L, STA 1811. THE OLD REPAIR WAS REMOVED. A PERMANENT REPAIR WAS FABRICATED AND INSTALLED IAW ECRA 5310-03467.
Part: LONGERON — CORRODED (BS 1708)
INSPECTION FOUND LONGERON 51R CORRODED AT STA 1708. THE CORRODED AREA WAS CUTOUT. A LONGERON AND SPLICE WERE FABRICATED AND INSTALLED IAW SRM 53-10-00, FIGURE 1, TYPE III, AND SRM 51-33-01.
Part: SHEAR TIE — CORRODED (BS 1721)
INSPECTION FOUND FRAME SHEAR TIE CORRODED AT STA 1721, BETWEEN LONGERON 49L AND 47L. THE CORRODED SECTION OF SHEAR TIE WAS REMOVED AND A NEW SHEAR TIE SECTION WAS INSTALLED IAW SRM 51-33-01 AND 51-35-01.
Part: SKIN — CORRODED (BS 1681-1701)
INSPECTION FOUND FUSELAGE SKIN CORRODED BELOW CENTER PIT DOOR AT STA 1681-1701, L48L TO L48R. THE CORRODED AREA OF SKIN WAS CUT OUT IAW SRM 53-20-00. SKIN FILLER, DOUBLER, TRIPLER, AND FINGER DOUBLERS WERE FABRICATED AND INSTALLED IAW SRM 53-20-00, FIGURE 6, 51-31-01, AND 51-21-01.
Part: SKIN — CRACKED (NR 2 ENG COWL)
INSPECTION FOUND A 1 CRACK IN SKIN WITH CORROSION AT FASTENER ON RIGHT HAND SIDE OF NR 2 ENGINE COWL, STA 2120 UPPER SURFACE AT BASE OF VERTICAL STABILIZER. THE CRACK WAS STOP DRILLED AND A DOUBLER WAS FABRICATED AND INSTALLED IAW ECRA 5530-01179. THE CORROSION WAS REMOVED IAW SRM 51-21-01.
Part: SHEAR TIE — CORRODED (BS 1821)
INSPECTION FOUND FRAME SHEAR TIE CORRODED AT STA 1821, BETWEEN LONGERON 48L AND 49L. THE CORRODED SECTION OF SHEAR TIE WAS REMOVED AND A NEW SHEAR TIE WAS INSTALLED IAW SRM 51-33-01 AND 51-35-01.
Part: SKIN — BUCKLED (BS 335)
INSPECTION FOUND FUSELAGE SKIN BUCKLED AT STA 335 JUST UNDER PILOT'S SLIDING WINDOW. THE AREA WAS REFORMED TO WITHIN LIMITS IAW SRM 53-20-00. A FINGER DOUBLER WAS FABRICATED AND INSTALLED IAW SRM 53-20-00 AND 51-31-01.
Part: ANGLE — CRACKED (WS 118)
INSPECTION FOUND A 5.5 INCH CRACK IN LT WING INBOARD ATTACH ANGLE AT WS XCW 118. THE ANGLE WAS REMOVED IAW SRM 51-33-01. A NEW ANGLE WAS FABRICATED AND INSTALLED IAW SRM 57-20-00.
Part: PANEL — CRACKED (NR 3 ENGINE)
INSPECTION FOUND NR 3 ENGINE ACCESS PANEL 487 FRAME CRACKED AT ATTACHMENT HOLE, A BROKEN NUTPLATE, AND CORROSION AT MATING SURFACE. THE CRACK WAS 1 INCH LONG. THE CRACKED AREA WAS REMOVED. DOUBLERS AND FILLERS WERE FABRICATED AND INSTALLED IAW SRM 54-00-01, FIGURE 2B. THE CORROSION AND NUTPLATE WERE REMOVED AND THE NUTPLATE WAS REPLACED IAW SRM 51-35-01.
Part: LONGERON — CORRODED (BS 1708)
INSPECTION FOUND LONGERON 50L CORRODED AT BS 1708. THE CORRODED SECTION WAS CUTOUT. A LONGERON AND SPLICE WERE FABRICATED AND INSTALLED IAW SRM 53-10-00, FIGURE 1, AND SRM 51-33-01.
Part: ANGLE — CRACKED (BS 1421)
INSPECTION FOUND A 2 CRACK IN FORMED ANGLE AT FUSELAGE SKIN, STA 1421, LONGERON 31L TO 32L, AT LT WING INBOARD TOP FILLET AREA. THE ANGLE WAS REMOVED. A REPAIR ANGLE WAS FABRICATED AND INSTALLED IAW SRM 53-53-01, VOL II, 51-31-01, VOL II, AND 51-33-01, VOL 11.
Part: SKIN — DENTED (RT ELEVATOR)
INSPECTION FOUND FIVE DENTS IN UPPER SKIN OF RT DETACHABLE ELEVATOR. THE DENTED SKIN WAS REMOVED IAW SRM 55-00-01, FIG. 1, VOL I AND 55-00-01, FIG. 2, VOL I. REPAIR DOUBLERS WERE FABRICATED AND INSTALLED IAW SRM 55-00-01, FIG. 3, VOL I AND 51-35-02, VOL II.
1996
Part: CONTROL CABLE — BROKEN (RT MLG DOOR)
THE AIRCRAFT ARRIVED IN EWR WITH THE RT MLG DOOR HANGING DOWN. MAINTENANCE FOUND THE RT MLG DOOR FOLLOW-UP CABLE BROKEN. THE CABLE WAS REMOVED AND REPLACED AND OPERATIONAL CHECKS WERE GOOD.
Part: LONGERON — CORRODED (BS 1405)
KUL - INSPECTION FOUND CORROSION ON LONGERON 31L AT STATION 1405. THE CORROSION WAS REMOVED AND A DOUBLE ANGLE REPAIR WAS INSTALLED IAW ECRA 5310-03217 AND SRM 53-14-01. (M)
Part: LONGERON — CORRODED (BS 1436)
KUL - INSPECTION FOUND LONGERON 30L CORRODED AT STATION 1436. THE LONGERON WAS REPAIRED IAW ECRA 5310-03218 AND SRM 53-14-01. (M)
Part: STIFFENER — CORRODED (FS 1841)
KUL - INSPECTION FOUND LATERAL STIFFENER CORRODED AT FS 1841 RBL 42 AND LBL 28. THE LATERAL STIFFENERS WERE REPLACED IAW SRM 53-16-01. (M)
Part: DOOR FRAME — CRACKED (CARGO DOOR)
KUL - INSPECTION FOUND TWO EACH 4 INCH CRACKS ON CENTER CARGO DOOR OUTER FRAME BY FORWARD LOWER STRIKER PLATE. THE CRACKS WERE REPAIRED IAW SRM 52-10-00, FIGURE 3. (M)
Part: FLOOR BEAM — CORRODED (BS 1701)
KUL - INSPECTION FOUND CORROSION ON FLOOR BEAM AT STATION 1701. REPAIRED IAW ECRA 5310-03225. (M)
Part: LONGERON — CORRODED (BS 1811)
KUL - INSPECTION FOUND CORROSION ON BOTH SIDES OF LONGERON 46L AT STATION 1811. REPAIRED IAW ECRA 5310-03221. (M)
Part: LONGERON — CORRODED (BS 1536/1545)
KUL - INSPECTION FOUND CORROSION IN LONGERON SPLICE 37R AT STATION 1536 AND 1545. REPAIRED IAW ECRA 5310-03223. (M)
Part: LONGERON — CORRODED (BS 1561)
KUL - INSPECTION FOUND CORROSION IN LONGERON SPLICE 32R AT STATION 1561. REPAIRED PER ECRA 5310-03222. (M0
Part: LONGERON — CORRODED (BS 1406)
KUL - INSPECTION FOUND CORROSION IN THE FLANGE OF LONGERON 37L AT STATION 1406. REPAIRED IAW ECRA 5310-03217. (M)
Part: LONGERON — CORRODED (BS 1412)
KUL - INSPECTION FOUND CORROSION IN RIGHT FLANGE OF LONGERON 30L AT STATION 1412. REPAIRED IAW ECRA 5310-03219. (M)
Part: LONGERON — CORRODED (BS 1409)
KUL - INSPECTION FOUND CORROSION IN FLANGE OF LONGERON 32L AT STATION 1409. REPAIRED IAW ECRA 5310-03215. (M)
Part: FRAME — CORRODED (BS 1841)
KUL - INSPECTION FOUND CAP CORRODED AT FRAME, STATION 1841 BETWEEN LONGERONS 50L AND 51R. THE AREA WAS REPAIRED IAW ECRA 5310-03214. (M)
Part: FAIRING — CORRODED (RT TE FLAP)
KUL - INSPECTION FOUND CORROSION IN SKIN AND DOUBLER OF THE RIGHT PANEL ASSEMBLY OF RIGHT WING INBOARD FLAP OUTER HINGE FAIRING. REPAIRED IAW ECRA 5752-01017. (M)
1995
Part: LONGERON — CORRODED (BS 1536/1545)
KUL - INSPECTION FOUND LONGERON 37R SPLICE CORRODED AT STATION 1536 AND 1545. THE AREA WAS REPAIRED IAW ECRA 5310-03223. (M)
Part: RUBBER DUCT — BLOWN (NR 2 PACK)
GUM - FLT 0900 - THE SYSTEM NR 1 AND NR 2 MANIFOLD FAIL LIGHTS ILLUMINATED IN FLIGHT WITH NR 2 DISPLAYING THE LOWEST PRESSURE. THE AIRCRAFT WAS RETURNED TO GUM WHERE THE AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE FOUND A BLOWN RUBBER DUCT ON NR 2 PACK HEAT EXCHANGER. THE DUCT WAS REPLACED AND LEAK CHECK WAS GOOD. THE AIRCRAFT WAS PRESSURIZED TO 4 PSI USING PACKS NR 2 AND NR 3, AND NO ABNORMAL INDICATIONS WERE NOTED. (M)