N622AT
Operators of this aircraft
Who operated this tail, and how firmly we know it.
| Operator | Role | Period | Basis |
|---|---|---|---|
| AIR TREK, INC. (FDIA) | Certificate holder | — | Matched by certificate designator |
Accident & incident history
No NTSB accidents or incidents on file for this aircraft.
Maintenance disclosures
CABIN FILLED WITH SMOKE CLAIMING THROUGH 25,000 FT. CREW DESCENDED TO AN UNEVENTFUL LANDING. LOW OIL PRESS ON TAXI IN ON LT ENG & NO OIL ON DIP STICK AFTER SHUTDOWN. CONFIRMED METAL CONTAMINATION IN THE OIL SYS. THE SOURCE OF THE METAL CONTAMINATION WAS THE UPPER DUPLEX BEARING WHICH LOST ALL OF THE ROLLERS & CAGE FROM THE UPPERMOST OF THE BEARINGS. METAL WAS PUMPED THROUGHOUT THE ENG & DAMAGED THE GEAR DRIVE BEVEL GEARS & NR 2 BEARING. THE UPPER DUPLEX BEARING HAD NO SIGNS OF LUBRICATING ISSUES & THE NOZZLES IN THE AREA, ALL FLOWED WITH NO RESTRICTIONS. THE EXACT CAUSE OF BEARING DISTRESS COULD NOT BE DETERMINED. THE DUPLEX BEARING WAS AN OVERHAULED UNIT INSTALLED AT THE LAST OVERHAUL. THE CAUSE OF THE REPORTED SMOKE IN THE CABIN IS BELIEVED TO BE RELATED TO THE UPPER DUPLEX BEARING DISTRESS. IT IS COMMON WHEN A BEARING FAILS IN SERVICE THERE IS OIL LEAKAGE IN THE ADJACENT AIR & OIL SEALS WHICH PROVIDE A STABLE AIR PRESS TO HOLD & CONTROL OIL FROM ESCAPING PAST THE AIR SEAL. THE DAMAGE OF THE NR 2 BEARING ALLOWED OIL LEAKAGE INTO THE GAS PATH & WOULD HAVE ENTERED THE CABIN AIR BLEED PORTS DOWNSTREAM RESULTING IN SMOKE IN THE CABIN. THE ENG WAS RESTORED TO SERVICEABLE CONDITION & RETURNED TO SERVICE.
CABIN FILLED WITH SMOKE CLIMBING THROUGH 25,000 FT. PILOTS & CREW USED OXYGEN FOR AN QUICK DESCENT THROUGH 10,000 FT & THE CABIN CLEARED ENOUGH TO GO OFF OXYGEN. THEY DIVERTED & LANDED OTHERWISE UNEVENTFULLY. LT ENG OIL PRESS WAS IN THE YELLOW ARC TAXING IN. LT ENG WAS FOUND TO HAVE NO OIL SHOWING ON THE DIP STICK AFTER SHUTDOWN. CAUSE OF PROBLEM IS UNDETERMINED AT THE TIME OF THIS REPORT. ADDITIONAL INFORMATION WILL BE SUBMITTED WHEN AVAILABLE.
CABIN FILLED WITH SMOKE CLIMBING THROUGH 25,000 FT. PILOTS & CREW USED OXYGEN FOR A QUICK DESCENT THROUGH 10,000 FT & THE CABIN CLEARED ENOUGH TO GO OFF OXYGEN. THEY DIVERTED & LANDED OTHERWISE UNEVENTFULLY. LT ENG OIL PRESS WAS IN THE YELLOW ARC TAXING IN.
IN CRUSE AT 34,000 FEET A CHANGE IN ENG TONE WAS NOTED. WITHIN 20 SECONDS THICK SMOKE ENTERED THE CABIN. PILOT DECLARED EMERGENCY AND DESCENDED. LT ENG 'OIL PRESSURE LOW' LIGHT CAME ON AROUND 20,000 FEET AND ENG WAS SHUTDOWN. AFTER SHUTDOWN THE SMOKE IN THE CABIN CLEARED UP. LANDING WAS MADE. THERE WAS NO DAMAGE TO THE ACFT AND NO ONE WAS HURT. SUSPECTED FAILURE IS THE NR 2 BEARING AIR/CARBON SEAL IN THE LT ENG WHICH CAUSE ENG OIL TO ENTER INTO COMPRESSOR SECTION OF ENG AND THEN INTO THE CABIN THROUGH THE BLEED PORTS. ENG IS BEING REMOVED FROM ACFT AND SENT TO REPAIR CENTER.