# Incident 20040106005519I: Doug MD11F, Anchorage, AK, January 6, 2004

- Type: FAA incident report (Accident/Incident Data System), as reported
- Date: January 6, 2004, 10:00 local time
- Place: Anchorage, AK
- Phase of flight: Normal Cruise
- Operating rules: Air carrier (Part 121)
- Operator: IPXA
- Location: 61.2181° N, 149.9003° W: Placed by OpenAirDocs: center of Anchorage, AK, within about 23 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=61.2181&lon=-149.9003&mi=10
- Aircraft: N270UP, a cancelled registration (https://openairdocs.org/deregistered/N270UP-2025-01-21) (OpenAirDocs)
- Registry model: Mcdonnell Douglas MD-11F (registry code 3023600, https://openairdocs.org/model/mcdonnell-douglas-md-11f) (OpenAirDocs)
- Registry engine: Pratt & Whitney PW4000 series (registry code 52119, https://openairdocs.org/engine/pratt-whitney-pw4000-series) (OpenAirDocs)
- Reported make and model: DOUG MD11F
- Reported engine: PWA PW4460
- People aboard: 2
- Fatal injuries: 0
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/20040106005519I

## Narrative

As the FAA filed it, in capitals; the FAA replaces private details with ^PRIVACY DATA OMITTED^.

(-23) BRIEFING PAPER: SUBJECT: UNITED PARCEL SERVICE (UPS) MD11 N270UP AIR TURN BACK (ATB) DUE TO LOSS OF NUMBER 1 AC BUSS. BACKGROUND: UPS FLIGHT 6995 DEPARTED ANCHORAGE, ALASKA FOR INCHON, KOREA. APPROXIMATELY 2.5 HOURS INTO THE FLIGHT AT FL 360 THE CREW EXPERIENCED A FAILURE OF THE NUMBER 1 AC BUS ALONG WITH NUMEROUS CIRCUIT BREAKERS POPPING (EXACT NUMBER AND POSITION UNKNOWN). FLIGHT CREW FOLLOWED THE EMERGENCY PROCEDURES OUTLINED IN THEIR MANUAL AND RETURNED TO ANCHORAGE. AIRCRAFT LANDED UNEVENTFULLY. WHEN THE NUMBER 1 AC GENERATOR BUS FAILED THE FOLLOWING SYSTEMS BECAME INOPERATIVE: TANK 1 FORWARD FUEL PUMP, AUX TAIL TANK LEFT TRANSFER FUEL PUMP, FUEL QUANTITY NORMAL POWER, MANIFOLD FAIL DETECTION LOOP 1, LEFT WINDSHIELD ANTI-ICE CONTROL, ICE DICTION CONTROLLER ENGINE 1, CAC FAN 1 (CENTER ACCESSORY COMPARTMENT), AVIONICS RACK FAN 1 CONTROL, AVIONICS COMPARTMENT EXHAUST FAN, AVIONICS VENTURE SYSTEM CONTROL, ESC CHANNEL B (ENVIRONMENTAL SYSTEM CONTROL), TURBINE BYPASS VALVE PACK 1, ACC 1 AUTO CONTROL POWER (AC CABIN BUS CONTROL), NUMBER 1 HF TRANSCEIVER, DISPLAY UNITS 1 AND 3, DISPLAY ELECTRONIC UNIT 1, CAPTAINS AUDIO CONTROL PANEL, AIR DATE COMPUTER 1, ENGINE IGNITION 1, 1-3 ISOLATION VALVE CONTROL, STANDBY HORIZON, ALTIMETER BACKUP LIGHTS, VOR 1, PACKS 1, 2, AND 3 RAM AIR DOOR BACKUP POWER, MULTI-FUNCTION CONTROL DISPLAY UNIT 1. WHEN ALL THIS TOOK PLACE THE CREW RECEIVED AN ALERT AND CONSEQUENCE MESSAGE THAT STATED "BUS AC 1 OFF GPWS INOP  AUTO GROUND SPOILERS INOP". DISCUSSION: UPS MAINTENANCE WORKING WITH UPS TECH SUPPORT IN LOUISVILLE IDENTIFIED THE PROBLEM AS A FAILED RCCB (REMOTE CONTROL CIRCUIT BREAKER) FOR THE "A" PHASE OF AC GENERATOR BUS 1, (ITEM NUMBER B1-174). WHEN THIS BREAKER FAILED ALL COMPONENTS THAT ARE 3 PHASE HAD THEIR PHASE "B" AND "C" CIRCUIT BREAKERS POP. THE RCCB WAS REPLACED AND MAINTENANCE PERFORMED THE APPROPRIATE OPERATIONAL CHECKS AND ALL WAS FOUND TO FUNCTION NORMALLY. BECAUSE THIS OFFICE WAS CONCERNED ABOUT A COMMENT IN THE LOG BOOK WHICH MENTIONED A LOSS OF "#1 COMM" THIS OFFICE REQUESTED THAT UPS MAINTENANCE DUPLICATE THE PROBLEM AND CHECK THE NUMBER 1 VHF FOR PROPER OPERAITON. A CHECK WAS PERFORMED AS REQUESTED AND THE NUMBER 1 VHF COMM FUNCTIONED NORMALLY. THIS OFFICE WOULD LIKE TO POINT OUT THAT THIS TYPE OF FAILURE IS IDENTIFIED IN THE ABNORMALS SECTION OF THE FLIGHT MANUAL. THE CREW FOLLOWED THESE PROCEDURES SUCCESS FULLY. NOTE: THE INITIAL REPORT SENT BY THE ANCHORAGE FSDO MENTIONED "ALL IRUS FAILED" THIS WAS NOT THE CASE. THE CREW STILL HAD ATTITUDE REFERENCE INFORMATION AS WELL AS NAVIGATIONAL INFORMATION. ^PRIVACY DATA OMITTED^

## Other reports on N270UP (1)

Matched to the same aircraft by N-number and date.

- [Incident 20170212007729I](https://openairdocs.org/incident/20170212007729I), Feb 12, 2017: Mcdonnell Douglas MD-11F (N270UP), New Caledonia, No damage. Provided by crew in ups event report 60194, submitted 2/13/2017 at 00:03Z: "In cruise we had several electrical issues. Two hours into flight we got fcc 2…

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. For accidents, the NTSB's own investigation is the fuller record.

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