# N27TT: 1977 Gates Learjet 35A, registration cancelled 2024-04-30

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: April 30, 2024
- Status when cancelled: Valid registration
- Airframe: [Gates Learjet 35A](https://openairdocs.org/model/gates-learjet-35a) (registry code 5170602)
- Engine: [Garrett TFE731 series](https://openairdocs.org/engine/garrett-tfe731-series) (registry code 29001)
- Data sheets: [TCDS A10CE](https://openairdocs.org/tcds/A10CE), [TCDS E6WE](https://openairdocs.org/tcds/E6WE) (OpenAirDocs)
- Serial number: 0122
- Year built: 1977
- Type of aircraft: Fixed wing multi engine
- Engine type: Turbo-fan
- Airworthiness: Standard, transport
- Airworthiness date: December 14, 1982
- Last registry action: July 26, 2010
- Mode S code: A2A5DE
- Owner when cancelled: [Alliance Air Parts Inc](https://openairdocs.org/faa-owner/ALLIANCE%20AIR%20PARTS%20INC)
- Location: [Oklahoma City, OK](https://openairdocs.org/faa-place/OK/Oklahoma%20City)
- Owner type: Corporation
- Owner's area on the map: 35.4676° N, 97.5164° W: Placed by OpenAirDocs: center of Oklahoma City, OK, within about 14 miles (OpenAirDocs). The owner's mailing address, not where the aircraft was based
- The mark today: https://openairdocs.org/aircraft/N27TT
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=27TT
- Page: https://openairdocs.org/deregistered/N27TT-2024-04-30

From the FAA registry file of November 5, 2026, cancelled registrations. Owners' street addresses are left out. The Mode S code belongs to the N-number, not the airframe.

ADs and bulletins for the Gates Learjet 35A: https://openairdocs.org/model/gates-learjet-35a.md

## Service difficulty reports (9)

Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model.

- [SDR BSYA2010003](https://openairdocs.org/sdr/BSYA2010003), Jan 8, 2010: ACTUATOR. MALFUNCTIONED. ON APPROACH GOING INTO DPA HAD NO RIGHT GEAR DOWN AND LOCK LIGHT, BLEW THE GEAR DOWN AND LANDED NO PROBLEMS. REMOVED AND REPLACED DEFECTIVE LANDING GEAR ACTUATO
- [SDR BSYA2009067](https://openairdocs.org/sdr/BSYA2009067), Dec 30, 2009: CHECK VALVE. DEFECTIVE. SHORTLY AFTER TAKEOFF OUT OF APA CREW TURNED ON NACELLE HEAT AND THE CABIN FILLED WITH SMOKE, RETURNED TO APA NO PROBLEMS. MAINTENANCE FOUND THE BLEED AIR CHECK
- [SDR BSYA](https://openairdocs.org/sdr/BSYA), Dec 29, 2009: PIN. BENT. ON APPROACH INTO APA WHEN GEAR SELECTED DOWN HAD NO RIGHT MAIN DOWN AND LOCK INDICATION, CREW THEN USED EMERGENCY AIR TO BLOW THE GEAR DOWN THEN THE LIGHT CAME 
- [SDR BSYA2009045](https://openairdocs.org/sdr/BSYA2009045), Aug 26, 2009: VOLT REGULATOR. FAULTY. EN ROUTE FROM TEB TO CPS LEFT GENERATOR KEPT FALLING OFF LINE, PILOT THEN DIVERTED INTO LCK. REMOVED AND REPLACED LEFT VOLTAGE REGULATOR, OPS CHECKS GOOD.
- [SDR BSYA200500026](https://openairdocs.org/sdr/BSYA200500026), Nov 6, 2005: WIRE. CHAFED. ON TAKE OFF OUT OF DAL LEFT MOD VALVE STUCK IN EMERGENCY AND POPPED CIRCUIT BREAKER. MAINTENANCE FOUND A CHAFED WIRE ON CONNECTOR ON MOD VALVE, REPAIRED WIRE OP
- [SDR BSY2005F00000](https://openairdocs.org/sdr/BSY2005F00000), Oct 17, 2005: ADC. DEFECTIVE. THE PILOTS ALTIMETER BLANKED OUT AND ALTITUDE ALERTER DIED. THE ADC WAS FOUND TO BE DEFECTIVE AND REPLACED. THE SYSTEM WAS TESTED AND INSPECTED AND FOUND TO COM
- [SDR BSY2004F00002](https://openairdocs.org/sdr/BSY2004F00002), Mar 13, 2003: BULB. INOPERATIVE. NO NOSE GEAR DOWN AND LOCK LIGHT. REMOVED AND REPLACED BULB, OPS CHECK GOOD.
- [SDR 99ZZZX186](https://openairdocs.org/sdr/99ZZZX186), Nov 24, 1998: SWITCH. MALFUNCTIONED. AIRCRAFT WAS ON APPROACH TO BVR, SELECTED GEAR DOWN, HAD NO GREEN LIGHT ON LEFT MAIN GEAR, DID A FLY-BY, TOWER REPORTED GEAR DOWN BUT NO LANDING LIGHT. AIRCRAFT
- [SDR 97ZZZX350](https://openairdocs.org/sdr/97ZZZX350), Nov 6, 1996: ENGINE. FAILED. LEFT ENG TEMPS WENT UP AND ENG STARTED MAKING NOISE, SHUT DOWN ENG. REMOVED AND REPLACED ENG. CAUSE UNKNOWN AT THIS TIME.

## FAA accident and incident reports (1)

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [Incident 19891115066169I](https://openairdocs.org/incident/19891115066169I), Nov 15, 1989: Lear 35A (N27TT), Dayton, OH. Lost cabin pressure en route. Precautionary descent. Landed at alternate airport.

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