# Service difficulty reports: N481MC A list on [N481MC](https://openairdocs.org/aircraft/N481MC.md). Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model. Newest first. - [SDR UIEA2026072200637](https://openairdocs.org/sdr/UIEA2026072200637.md): Light · inoperative · Jul 22, 2026 · N481MC · Boeing 747443 · Emergency Lighting > LEFT HAND & RT NR 3 OVERWING EMERGENCY LIGHT INOPERATIVE. REMOVED & REPLACED LT & RT EMERGENCY OVERWING LIGHT ASSY IAW AMM 33-51-03. OPS CHK OK. - [SDR UIEA2026062500540](https://openairdocs.org/sdr/UIEA2026062500540.md): Bulb · inoperative · Jun 25, 2026 · N481MC · Boeing 747443 · Emergency Lighting > LEFT AFT OVERWING EMERGENCY LIGHT INOPERATIVE. EMERGENCY LIGHTS AT 73C & 49G. REMOVED & REPLACED THE LT AFT OVERWING EMERGENCY LIGHT IAW AMM 33-51-03 & REPLACED THE CEILING EMERGENCY LIGHTS 49G & 73C IAW AMM 33-51-40-7. OPS CHKED OK. - [SDR UIEA2026020500031](https://openairdocs.org/sdr/UIEA2026020500031.md): Skin · damaged · Feb 5, 2026 · N481MC · Boeing 747443 · Horizontal Stabilizer, Plate/Skin > PERFORM EO 4455A061 PART 2 ZONE B INSPECTION. FOUND FREEZE PLUG INSTALLED AT RH HORIZONTAL STAB UPPER SKIN UPPER REAR SPAR CHORD LG OTBD #15. ACCOMPLISHED EI T2026A55M-086 REV 0. JOB COMPLETED AND CONDITION CHECK NORMAL.

) - [SDR UIEA2026020500032](https://openairdocs.org/sdr/UIEA2026020500032.md): Skin · debonded · Feb 5, 2026 · N481MC · Boeing 747443 · Trailing Edge Flaps > DISBOND - RT WING OTBD AFT FLAP EXISTING DOUBLER ON LWR SURFACE. PERFORM PERMANENT REPAIR AT RH WING OTBD AFT FLAP LWR SURFACE NEAR WBL 548 IAW EGAT EI T2026A57M-080 REV 1. CONDITION CHECK IS GOOD

) - [SDR UIEA2026020500033](https://openairdocs.org/sdr/UIEA2026020500033.md): Fairing · debonded · Feb 5, 2026 · N481MC · Boeing 747443 · Trailing Edge Flaps > DISBOND. RH WING OTBD AFT FLAP LWR SURFACE NEAR #8 FLAP TRACK FAIRING. PERFORM DISBOND AND CORROSION INTERIM REPAIR ON RT WING OTBD AFT FLAP LWR SURFACE BETWEEN WBL 731 AND WBL 747 IAW EGAT EI T2026A57M-094 REV 2. CONDITION CHECK IS GOOD. - [SDR UIEA2026020500034](https://openairdocs.org/sdr/UIEA2026020500034.md): Spar Web · corroded · Feb 5, 2026 · N481MC · Boeing 747443 · Fuselage Main, Structure > DAMAGE ON CENTER WING REAR SPAR WEB RH SIDE NEAR JETTISON PUMP AT STA 1240 RBL 93. ACCOMPLISHED EI T2026A57M-110 REV 1. JOB COMPLETED AND CONDITION CHECK GOOD. - [SDR UIEA2026020500035](https://openairdocs.org/sdr/UIEA2026020500035.md): Door Frame · cracked · Feb 5, 2026 · N481MC · Boeing 747443 · Fuselage Main, Structure > PERFORM SB 4453A356 PART 1-3, FOUND CRACK HOLE AT DOOR NR 2 LH FWD EDGE FRAME, BS 800 S16L AREA. PERFORM EI T2026A53M-162 REV 0. ACCOMPLISH EI T2026A53M-162 REV 1. NO FURTHER DEFECTS NOTED. - [SDR UIEA2026020500036](https://openairdocs.org/sdr/UIEA2026020500036.md): Doubler · corroded · Feb 5, 2026 · N481MC · Boeing 747443 · Wing Main, Frame Structure > LEFT WING INBD REAR SPAR OVERRIDE JETTISON PUMP TANK #2 FWD M222. REMOVE REWORKED DOUBLER IAW SRM 51-40-02-0G-0 REV R125. ACCOMPLISHED EI T2026A57M-113 REV 0 & W/S 69034 (DWG 65B19560 REV B). ACCOMPLISHED EI T2026A57M-113 REV 1. JOB COMPLETED AND CONDITI - [SDR UIEA2026020500037](https://openairdocs.org/sdr/UIEA2026020500037.md): Light · inoperative · Feb 5, 2026 · N481MC · Boeing 747443 · Emergency Lighting > FOUND OVERWING EMERGENCY LIGHT INOP AT L1870 FWD SIDE. IAW AMM 33-51-03-004-034 & 33-51-03-404-007 REV 115. R & R OVERWING EMERGENCY LIGHT (L1870). IAW AMM 33-51-03-404-007 REV 115 PERFORMED EMERGENCY LIGHT ASSY INSTALLATION TEST & THE RESULT WAS GOOD. - [SDR UIEA2026020500038](https://openairdocs.org/sdr/UIEA2026020500038.md): Indicator · cracked · Feb 5, 2026 · N481MC · Boeing 747443 · Emergency Lighting > FOUND EMERGENCY EXIT INDICATOR LIGHT (M2989) BASE CRACK AT L2 DOOR. REF IPC 33-51-12-01A REV 91 & AMM 33-51-00-715-001 REV 115. R & R L2 DOOR EMERGENCY EXIT INDICATOR LIGHT ASSY (M2989) AND PERFORMED EMERGENCY LIGHTS OPS TEST, TEST WAS GOOD. - [SDR UIEA2026020500039](https://openairdocs.org/sdr/UIEA2026020500039.md): Power Supply · no test · Feb 5, 2026 · N481MC · Boeing 747443 · Emergency Lighting > FOUND EMERGENCY LIGHT BATTERY (M5933) FUNCTION FAIL. IAW AMM 33-51-04-902-001-001 REV 115. R & R EMERGENCY LIGHT BATTERY POWER SUPPLY (M5933) & PERFORMED POWER SUPPLY INSTALLATION TEST, TEST GOOD. - [SDR UIEA2026020500040](https://openairdocs.org/sdr/UIEA2026020500040.md): Battery · no test · Feb 5, 2026 · N481MC · Boeing 747443 · Emergency Lighting > FOUND EMERGENCY LIGHT BATTERY (M7928) FUNCTION FAILED. IAW AMM 33-51-04-902-001-001 REV 115. R & R EMERGENCY LIGHT BATTERY (M7928) & PERFORMED EMERGENCY LIGHT BATTERY INSTALLATION TEST, TEST WAS GOOD. - [SDR UIEA2026020500041](https://openairdocs.org/sdr/UIEA2026020500041.md): Light · no test · Feb 5, 2026 · N481MC · Boeing 747443 · Emergency Lighting > FOUND CREW REST EMERGENCY LIGHT ASSY (M8925) FUNCTION FAIL. REF IPC 33-29-10-40B REV 91 & AMM 33-51-00-715-001 REV 115. R & R CREW REST EMERGENCY LIGHT (M8925) & PERFORMED EMERGENCY LIGHTS OPS TEST, TEST GOOD. - [SDR UIEA2026020500042](https://openairdocs.org/sdr/UIEA2026020500042.md): Battery · inoperative · Feb 5, 2026 · N481MC · Boeing 747443 · Emergency Lighting > FOUND EMERGENCY LIGHT BATTERY (M7916) INOPERATIVE. IAW AMM 33-51-04-0902-001-001 REV 115, R & R EMERGENCY LIGHT BATTERY (M7916) & PERFORMED BATTERY INSTALLATION TEST, TEST GOOD

) - [SDR UIEA2025072301008](https://openairdocs.org/sdr/UIEA2025072301008.md): Lamp · inoperative · Jul 27, 2025 · N481MC · Boeing 747443 · Emergency Lighting > R5 DOOR JAM EMERGENCY EXIT LIGHT INOP. REPLACED R5 DOOR JAM EMERGENCY EXIT LIGHT IAW AMM 33-51-05-962-031. TEST GOOD. - [SDR UIEA2025072401014](https://openairdocs.org/sdr/UIEA2025072401014.md): Lamp · inoperative · Jul 27, 2025 · N481MC · Boeing 747443 · Emergency Lighting > L2 DOOR EMERGENCY EXIT SIGN HAS MULTIPLE INOPS LIGHTS. REPLACED MULTIPLE LAMPS FOR THE L2 DOOR EXIT SIGN IAW B747-400 AMM 33-51-12-962-170. TEST GOOD. - [SDR UIEA2025072401015](https://openairdocs.org/sdr/UIEA2025072401015.md): Lamp · inoperative · Jul 27, 2025 · N481MC · Boeing 747443 · Emergency Lighting > L1 DOOR EMERGENCY EXIT SIGN HAS MULTIPLE INOP LIGHTS. REPLACED MULTIPLE LAMPS FOR L1 DOOR EMERGENCY EXIT SIGN IAW B747-400 AMM 33-51-12-962-170. TEST GOOD. - [SDR UIEA2025072401016](https://openairdocs.org/sdr/UIEA2025072401016.md): Lamp · inoperative · Jul 27, 2025 · N481MC · Boeing 747443 · Emergency Lighting > R1 DOOR EMERGENCY EXIT SIGN HAS MULTIPLE INOP LIGHTS. REPLACED MULTIPLE R1 DOOR EMERGENCY EXIT SIGN LAMPS IAW B747-400 AMM 33-51-12-962-170. TEST GOOD. - [SDR UIEA2025070200829](https://openairdocs.org/sdr/UIEA2025070200829.md): Oxygen Bottle · low pressure · Jul 2, 2025 · N481MC · Boeing 747443 · Crew Oxygen System > CREW OXY LOW. INDICATED 1560 PSI ON GROUND BEFORE TAKE-OFF. INDICATED 500 DURING CLIMB WHEN WE GOT EICAS MESSAGE.(

R/R CREW O2 BOTTLE IAW AMM 12-15-08. BOTTLES PRESERVICED TO 1800PSI, NO LEAKS NOTED. OPS CHECK GOOD. CHANGED DUE TO LOSE B-NUT RESULTING IN TAN - [SDR UIEA2024082300842](https://openairdocs.org/sdr/UIEA2024082300842.md): Flap System · malfunctioned · Aug 23, 2024 · N481MC · Boeing 747443 · Trailing Edge Flap Control System > UPON LANDING ATTEMPT IN OSAN, FLAPS NEVER INDICATED 30 DEGREES. WHEN 30 DEGREES WAS SELECTED, FLAPS IND STOPPED AT BETWEEN 25 & 30 AND STAYED MAGENTA.(

NO CORRELATED FAULT MSG NOTED. INSPECTED LE & TE FLAPS SYS AND NO DEFECTS NOTED. RESET ASSOCIATED BREAKERS - [SDR UIEA2023040700338](https://openairdocs.org/sdr/UIEA2023040700338.md): Unknown · unknown · Apr 7, 2023 · N481MC · Boeing 747443 · Lighting System > UPPER DECK EXIT SIGN RH DOOR INOP(

R/R RH UPPER DECK DOOR EMERGENCY EXIT SIGN IAW WDM 53-51-01. OPS CHECK GOOD

) - [SDR UIEA2022112001198](https://openairdocs.org/sdr/UIEA2022112001198.md): Switch · faulted · Nov 18, 2022 · N481MC · Boeing 747443 · Drag Control System > SPOILER CONFIG AT 55 KNOTS. LOW SPEED RTO. REMOVED AND REPLACED SWITCH S217 IAW AMM 27-62-10. OPS CHECKED NORMAL. - [SDR UIEA2022011100010](https://openairdocs.org/sdr/UIEA2022011100010.md): None · none · Jan 11, 2022 · N481MC · Boeing 747443 · Doors > DOOR UPPER DECK(RIGHT) FLIGHT LOCK SWITCH FAIL MSG(

TRANSFERRED TO MDDR 159680 PER DDG 52-23-06-01B CAT C DUE 21JAN22 PLACARD INSTALLED TIME 0318Z INIT DC

) ## The whole list in SQL Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS: ```sql SELECT sdr_id, difficulty_date, n_number, aircraft_make, aircraft_model, part_name, part_condition, jasc_code, discrepancy FROM 'https://openairdocs.org/data/latest/faa_service_difficulty_report.parquet' WHERE n_number = 'N481MC' AND registry_match = 'registration' ORDER BY difficulty_date DESC ``` This list as a web page: https://openairdocs.org/aircraft/N481MC/reports --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.