N53GH
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
AIRCRAFT WAS IN CRUISE AT FL 35000, WHEN CREW NOTICED THAT THE AIRCRAFT BEGAN TO GRADUALLY DEPRESSURIZE. THE CREW ELECTED TO DESCEND TO A LOWER ALTITUDE. DURING DESCENT CABIN PRESSURE DROP CAUSED THE AURAL WARNING HORN TO SOUND AND PAX OXYGEN MASKS TO DEPLOY. CREW THEN DECLARED AN EMERGENCY AND DIVERTED TO BUF INTERNATIONAL AIRCRAFT MADE NORMAL LANDING. AIRCRAFT WAS INSPECTED AND FOUND CLAMPS SECURING MAIN CABIN AIR SUPPLY TUBE FLEX COUPLINGS HAD LOOSENED CAUSING LEAKAGE AND SUBSEQUENT LOSS OF PRESSURIZATION SYSTEM EFFICIENCY. ALL COUPLINGS CLAMPS SECURED A ACCOMPLISHED SYSTEM TEST. CHECKED OK.
ISP - AFTER TAKEOFF, CABIN AND COCKPIT FILLED WITH SMOKE (ENGINE OIL FUMES). EMERGENCY ACTIONS WERE TAKEN AND AIRCRAFT RETURNED TO ISP WITHOUT INCIDENT. BORESCOPE INSPECTION OF ENGINE COMPRESSOR SECTION REVEALED OIL PRESENT IN THE NR 4 AND NR 5 BEARING CARBON SEAL CAVITY. ENGINE TEAR DOWN WILL BE REQUIRED. FINAL REPORT TO FOLLOW. LANDINGS, 6,624.
ISP - AFTER TAKEOFF, CABIN AND COCKPIT FILLED WITH SMOKE (ENGINE OIL FUMES). EMERGENCY ACTIONS WERE TAKEN AND AIRCRAFT RETURNED TO ISP WITHOUT INCIDENT. BORESCOPE INSPECTION OF ENGINE COMPRESSOR SECTION REVEALED OIL PRESENT IN THE NR 4 AND NR 5 BEARING CARBON SEAL CAVITY. OIL LEAKAGE PAST THE NR 4 AND NR 5 AIR/OIL SEALS RESULTED IN SMOKE IN THE CABIN. BOTH THE NR 4 AND NR 5 SEALS WERE REPLACED AND THE NR 5 SEAL AREA SCAVENGE CAPABILITY IMPROVED WITH THE INCORPORATION OF SB 72-3540. THE ENGINE HAS BEEN REASSEMBLED AND HAS DEMONSTRATED ACCEPTABLE PERFORMANCE/FUNCTION ON TEST CELL AND RETURNED TO SERVICE.