Incident at GANDER INTL NL (CYQX)
2001-08-20: Update from Company Representative August 17, 2001, The overheat condition in the wing was a false indication caused by a defective box. The box was changed and the system functioned normally. The loss of pressurization that resulted from turning off the left pack appears to have been caused by a leak in the aircraft. Boeing pressure tested the aircraft with only 1 flow pack operational and the aircraft did not meet the minimum specifications as defined in the maintenance manual. Apparently this leak has been in the aircraft since it was delivered and the flow with both packs working was sufficient to keep the pressurization within limits. There is insufficient flow with only 1 pack working to maintain pressurization. The source of the leak has not been determined and the aircraft is grounded until the source has been found.
2001-08-08: VPBRM B737 on route eastbound at FL 390 KMCO-LIEE called a Mayday with emergency decent from Fl 390 to 10000 Ft and divert to Gander . Pilot advised there was a breach on the left side and overheat in the datafix system causing a fire indication . This subsequently caused a loss of pressurisation. Traffic in decent was DAL 126 eastbound at Fl 330 on route 48/50 49/40 operating 27 minutes behind VPBRM. unable to determine the exact separation which existed when VPRM went through Fl 330 , however it is estimated to be at least 30 nm laterally where 60nm was required. No fuel dump required . No injuries , no assistance requested . Landed at 0411. TSB: Case closed
2001-08-20: TSB Update August 9, 2001. A01A0093: THE CREW OF VP-BRM, A BOEING 737-700BJ EN ROUTE FROM ORLANDO TO CAGLIARI ITALY via 49/50 and 50/40, RECIEVED AN INDICATION OF AN OVERHEAT IN THE LEFT WING BODY (INDICATION #34). THE CREW FOLLOWED THE QRH AND SECURED THE LEFT AIR CONDITIONING PACK. SHORTLY AFTER, THE CREW NOTICED THAT THE CABIN PRESSURE WAS CLIMBING ABOVE THE NORMAL 8000 FEET AT 200-300 FPM. AT ABOUT 9000 FEET CABIN PRESSURE THE CREW DONNED OXYGEN MASKS. THE CREW DECLRED A MAYDAY, CARRIED OUT NAT CONTINGENCY PROCEDURES AND INITIATED A RAPID DESCENT ON AUTOPILOT FROM FL390 TO 10,000. THE AIRCRAFT DIVERTED TO GANDER, AND LANDED SAFELY AT 01:41 NDT. A possible conflict occurred with DAL 126, EASTBOUND AT FL330 ON ROUTE 48/50 and 49/40, OPERATING 27 MINUTES BEHIND THE VPBRM. ATC was UNABLE TO DETERMINE THE EXACT spacing WHICH EXISTED WHEN VP-BRM WENT THROUGH FL330, HOWEVER IT IS ESTIMATED TO BE AT LEAST 30 NM LATERALLY WHERE 60 NM WAS REQUIRED.
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