- Registered owner
- United Airlines Inc
- Location
- Chicago, IL
- Owner type
- Corporation
- Serial number
- 66591
- Year built
- 2020
- Type
- Fixed wing multi engine
- Engine
- Turbo-fan
- Airworthiness
- Standard, transport
- Airworthiness date
- January 28, 2020
- Certificate issued
- January 29, 2020
- Expires
- January 31, 2030
- Mode S code
- A1F622
From the FAA registry file of October 24, 2026.
On this page
Airworthiness directives that may apply · 136
Matched by this aircraft’s airframe and engine models. Each AD’s applicability may narrow it by serial number, part number or equipment.
| 2000 | 1 |
|---|---|
| 2005 | 3 |
| 2006 | 2 |
| 2007 | 10 |
| 2008 | 6 |
| 2009 | 4 |
| 2010 | 9 |
| 2011 | 8 |
| 2012 | 12 |
| 2013 | 13 |
| 2014 | 11 |
| 2015 | 8 |
| 2016 | 9 |
| 2017 | 6 |
| 2018 | 6 |
| 2019 | 5 |
| 2020 | 11 |
| 2021 | 5 |
| 2022 | 9 |
| 2023 | 9 |
| 2024 | 8 |
| 2025 | 6 |
| 2026 | 7 |
See all 169 ADs
Information bulletins that may apply · 10
Advisory, not mandatory.
Airframe · Boeing 777-300ER
SAIB AIR-22-09R1AUTOPILOT FLIGHT DIRECTOR SYSTEM: ALT HOLD Engaged on Takeoff on Boeing Model 777/787 common fleets.SAIB AIR-20-19Flight Management Computing Software SystemSAIB NM-20-11Autopilot SystemSAIB NM-20-07Navigation - Glideslope SystemSAIB NE-19-03Escape Slide Maintenance Tasks and Intervals - JASC 2565SAIB NM-17-15Equipment/Furnishings - Inflatable Airbag AssemblySAIB NM-17-10Maintenance PracticesSAIB NM-15-03Flight ControlsSAIB NM-09-03Engine Fuel and Control - Implementing Fuel Tank System Airworthiness LimitationsSAIB NM-06-57Reports of damage to airplanes and to property on the ground caused by blue or clear ice falling from airplanes.NTSB investigations
No NTSB investigations matched to N2251UMatched by N-number and event date, checked against the reported serial number, make and model. Investigations from before this aircraft carried the mark are under Earlier aircraft. Investigations on Boeing 777-300ER aircraft
FAA incident reports
No FAA accident or incident reports matched to N2251UMatched by N-number and event date, checked against the reported make and model. Reports from before this aircraft carried the mark are under Earlier aircraft. Reports on Boeing 777-300ER aircraft
Service difficulty reports · 17
Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model.
SDR CALA2026090919323Duct · damagedROW 20ABC WAS PRODUCING VERY HOT AIR FROM LOWER SIDEWALL PANEL. HAD TO MOVE PASSENGERS FROM THE AREA DUE TO HEAT. PILOTS AND F/A'S BOTH REPORTED NO ODOR OR FUMES. ABLE TO DUPLICATE ON GROUND. TURNING OFF LT PACK STOPPED LOUD NOISE AND UNBEARABLE HEAT. FOUNSDR CALA2026051116144Switch · malfunctionedEMERGENCY LIGHTS CAME ON IN CRUISE. MOVED SWITCH TO OFF AND THEY STAYED ON. MOVED SWITCH TO ON AND THEN BACK TO ARMED AND LIGHTS WENT OUT. PERFORMED FIM PROCEDURE PER B773 FIM 33-51 TASK 802. NO ACTIVE CORRELATED MAINTENANCE MESSAGE. PERFORMED OPS TEST OF TSDR CALA2025100809781Pin · installedREF ETASK CARD 23-5212-1-2001. INSTALLED 2 EA. L2 PED SLIDE SAFETY PINS. RMV'D & STOWED 2 EA. SAFTEY PINS FOR PED L2 REF ETASK CARD 23-5212-1-2001. INSPECTED VERIFIED SLIDE PIN STOWED AND OPCH OK.
See all 17 reportsSTCs that may be installed · 312
Approved for this aircraft’s airframe or engine model. The registry doesn’t record which STCs an aircraft has; its records do.
See all 312 STCs
Earlier aircraft with this N-number · 1
This aircraft carried N2251U before the one registered now. The FAA can assign a mark to another aircraft once a registration is cancelled.