Aircraft record

N405YK1991 Boeing 737-436

Registration validUnclaimedSource: FAA, updated Oct 17, 2026

Safety record in brief:No NTSB accidents or incidents since 198221 ADs may apply132 service difficulty reports

Registration: Valid; expires Jul 31, 2027
Based in: Anchorage, AK; owner city / state
Engine: CFM56-3C1 · 23,515 lb thrust; Cfm Intl
Owners: 1; since 2020
NTSB events: None; since 1982
ADs may apply: 21; confirm with A&P
Service reports: 132; since 1995

Registration

FAA Aircraft Registry · Oct 17, 2026

Registered owner: Nas Aircraft Leasing Company LLC
Owner type: LLC
City, state: Anchorage, AK
Certificate issued: Jul 1, 2020
Expires: Jul 31, 2027
Airworthiness: Standard · Transport
Airworthiness date: Jun 24, 2020

We never show street addresses, even though they appear in the public FAA file. Individual owners are shown by city and state only.

Airframe & engine

FAA Registry + type data

Airframe

Manufacturer: Boeing
Model: 737-436
Year: 1991
Serial number: 25267
Aircraft type: Fixed wing multi engine
Category: Land
Certification: Type Certificated
Seats: 149
Engines: 2
Max takeoff weight: 20,000 and over lb
Mode S code: A4C164

Engine

Make and model: Cfm Intl Cfm56-3c1
Type: Turbo-fan
Power: 23,515 lb thrust

Total time and engine hours aren't public. They appear here once the owner adds logbooks.

Ownership history

Ownership history from FAA records

2020 – nowNas Aircraft Leasing Company LLCAnchorage, AK · current

Individual owners are shown by city and state only.

Safety record

NTSB · Oct 15, 2026 · FAA ADs · Oct 17, 2026 · SDRs · Oct 16, 2026

NTSB events (0)

No NTSB accidents or incidents found for this airframe since 1982.

Accident history for this model

ADs published since 1998 that may apply (21)

These match the airframe or engine model. Whether each one applies, and whether it's been complied with, depends on serial numbers, equipment and logbook entries. Applicability must be confirmed by a mechanic against the aircraft's records.

AD	Subject	Effective	Applies to
2019-14-02	Hydraulic power	Aug 27, 2019	Airframe (737-436)
2002-20-07 R1	Boeing Model 737 Series Airplanes	Nov 12, 2002	Airframe (737-436)
2002-20-07	Boeing Model 737 Series Airplanes	Nov 12, 2002	Airframe (737-436)
2001-11-11	Boeing Model 737, 747, and 777 Series Airplanes	Jul 16, 2001	Airframe (737-436)Serial numbers per Boeing Service Bulletins 737-25-1371 Rev 2, 737-25-1407, 747-25-3196 Rev 1, 777-25-0111 Rev 1
2001-10-14	Boeing Model 737, 747, 757, 767, and 777 Series Airplanes	Jun 8, 2001	Airframe (737-436)Serial numbers per Boeing Special Attention Service Bulletins 737-35-1076, 737-35-1077, 747-35-2111, 757-35-0021, 757-35-0022, 767-35-0043, 767-35-0044, 777-35-0008, all dated March 1, 2001. Only with: Equipped with chemical oxygen generators.

Show all 21 ADs

AD	Subject	Effective	Applies to
2001-08-24	Boeing Model 737 Series Airplanes	May 10, 2001	Airframe (737-436)
2000-22-02 R1	Boeing Model 737 Series Airplanes	Nov 13, 2000	Airframe (737-436)
2000-22-02	Boeing Model 737 Series Airplanes	Nov 13, 2000	Airframe (737-436)
2000-15-16	Boeing Model 737, 757, 767, and 777 Series Airplanes	Sep 12, 2000	Airframe (737-436)Certain serial numbers: 737 1–2984; 757 1–798; 767 1–682; 777 1–083. Only with: Ranges are line numbers; equipped with Puritan-Bennett passenger and flight attendant oxygen masks as listed in Boeing Service Bulletins 737-35-1049, 757-35-0014, 767-35-0033, or 777-35-0005.
99-11-05	Boeing Model 737 Series Airplanes	Jun 28, 1999	Airframe (737-436)
99-22-16	Boeing Model 737 Series Airplanes	Dec 7, 1999	Airframe (737-436)Serial numbers per Boeing Service Bulletin 737-52-1128, dated April 22, 1999, or Boeing Service Bulletin 737-52-1137, dated May 13, 1999
98-13-12 R1	Boeing Model 737, 747, 757, 767, and 777 Series Airplanes	Dec 28, 1998	Airframe (737-436)Serial numbers per Boeing Alert Service Bulletins 737-27A1212, 747-27A2368 Revision 2, 757-27A0128, 767-27A0156, 777-27A0029 Revision 1
98-22-10	Boeing Model 737 Series Airplanes	Nov 12, 1998	Airframe (737-436)Serial numbers per Boeing Service Bulletin 737-53A1108, Revision 5, dated October 26, 1989
98-18-20	Boeing Model 727 and Model 737 Series Airplanes Equipped with J.C. Carter Company Fuel…	Oct 21, 1998	Airframe (737-436)Only with: Equipped with J.C. Carter Company fuel valve actuators P/N 40574-2 (Kearfott Models 3715-7 and -8) or 40574-5 (Kearfott Model 3715-9).
98-13-12	Boeing Model 737, 747, 757, 767, and 777 Series Airplanes	Jul 6, 1998	Airframe (737-436)Serial numbers per Boeing Alert Service Bulletins 737-27A1212, 747-27A2368, 757-27A0128, 767-27A0156, and 777-27A0029, dated March 26, 1998
98-03-10	Boeing Model 737, 747, 757, and 767 Series Airplanes	Feb 19, 1998	Airframe (737-436)Certain serial numbers: 737 1–2836; 747 1–1104; 757 1–731; 767 1–642. Only with: Equipped with non-powered IPECO pilots' seats; ranges are line position numbers.
97-22-07	Boeing Model 737 Series Airplanes	Nov 12, 1997	Airframe (737-436)Certain serial numbers: 737 292–2565. Only with: Limited to airplanes with line numbers 292 through 2565 inclusive.
97-18-06	Boeing Model 737 Series Airplanes	Nov 12, 1997	Airframe (737-436)
97-05-10	Boeing Model 737 Series Airplanes	Mar 19, 1997	Airframe (737-436)Only with: Having a main rudder power control unit (PCU) identified in Boeing Service Letter 737-SL-27-112-B, dated February 6, 1997.
97-04-01	Boeing Model 737 Series Airplanes	Mar 21, 1997	Airframe (737-436)Serial numbers per Boeing Service Bulletin 737-27-1155, dated October 26, 1989, as revised by Notices of Status Change 737-27-1155NSC1, NSC2, and NSC3
95-23-10	Boeing Model 737 Series Airplanes	Dec 13, 1995	Airframe (737-436)

AI-extracted — verify against original. Matched from each AD's applicability section; ADs replaced by a later AD are left out.

Service Difficulty Reports (132)

Reports of failures and defects that operators and repair stations sent to the FAA since 1995. A report describes one finding; it is not an accident.

Equipment and furnishings · slide · unwanted deploySep 28, 2026
SLIDE DEPLOYED INADVERTENTLY
From FAA Service Difficulty Reports; matched by N-number and serial number.
Navigation · symbol generator · failedApr 24, 2026
CAPTAINS SIDE EFIS DISPLAYS WENT BLANK. NR 1 SG FAILED.
From FAA Service Difficulty Reports; matched by N-number and serial number.
Navigation · symbol generator · failedMar 7, 2026
NR 1 SYMBOL GENERATOR FAILED.
From FAA Service Difficulty Reports; matched by N-number and serial number.

Show all 10 reports

Fuselage · skin · crackedSep 9, 2025
CRACK FOUND AT BS 7270+13 BELOW ; STR 23L APPRX 1.75"LONG. CORRECTIVE: 8110 RECEIVED FOR IAW EO 737-53-0407
From FAA Service Difficulty Reports; matched by N-number and serial number.
Navigation · iru · failedAug 10, 2025
NUMBER 1 IRU FAULT ILLUMINATED, IRU FAILED. REMOVED AND REPLACED NR 1 IRU IAW AMM 34-28-31, OPS CHECK GOOD.
From FAA Service Difficulty Reports; matched by N-number and serial number.
Air conditioning and pressurization · outflow valve · faultedMar 18, 2025
CABIN ALTITUDE UNCONTROLLABLE IN STBY MODE. CABIN ALTITUDE 10,000 AT FL220. CABIN ALTITUDE CONTROLLABLE AFTER DESCENT INITIATED TO 10,000 FEET. REPLACED FWD OUTFLOW VALVE, ALSO FOUND CLAMP ON RH HEAT EXCHANGER BROKEN AND REPAIRED. OPS AND PRESSURE CHECK NORMAL.
From FAA Service Difficulty Reports; matched by N-number and serial number.
Fuselage · skin · corrodedJul 17, 2024
SURFACE CORROSION ON FUSELAGE EXTERNAL SKIN (AFT LAVATORY ACCESS PANEL1502 R L/E SIDE) BETWEEN BS998 AND BS1006 FROM S24R TO S25R. REPLACED ACCESS PANEL IAW AMM 52-49-6
From FAA Service Difficulty Reports; matched by N-number and serial number.
Fuselage · cargo track · corrodedJul 17, 2024
MAIN DECK CARGO LATERAL TRACK GOT CORROSION, STA727R, 727AR, 727FR, 727GR. REPLACED TRACK IAW SRM 51-40-02
From FAA Service Difficulty Reports; matched by N-number and serial number.
Wings · skin · corrodedJul 17, 2024
DURING NRC CA1559/473 CORRECTIVE ACTION REMOVE WING TIP SKIN FOUND CORROSION AT RH WING CLOSURE RIB ASSY LOWER HORIZONTAL FLANGE WBL560. REPAIRE CORROSION IAW EO 737-57-0045
From FAA Service Difficulty Reports; matched by N-number and serial number.
Wings · skin · corrodedJul 17, 2024
DURING NRC CA1559/473 CORRECTIVE ACTION REMOVE WING TIP SKIN FOUND CORROSION AT RH WING TIP FAIRING PANEL LOWER SKIN. REPAIRED CORROSION IAW EO 737-57-0046
From FAA Service Difficulty Reports; matched by N-number and serial number.

Showing the 10 most recent of 132 reports.

Sources

FAA Aircraft RegistryRegistration, owner city and state, airframe, engineupdated Oct 17, 2026
NTSB accident and incident databaseAccidents and incidents since 1982updated Oct 15, 2026
FAA Airworthiness Directives (Federal Register)ADs published since 1998updated Oct 17, 2026
FAA Service Difficulty ReportsReports since 1995updated Oct 16, 2026

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