# NTSB OAK76IP007: Boeing 747, N4735U, No.Pacific Ocean (Pacific Ocean), August 24, 1975

- Type: NTSB incident investigation
- Classification: Incident · No injuries · Closed
- Date: August 24, 1975
- Place: No.Pacific Ocean (Pacific Ocean) · NO.PACIFIC OCEAN, PO
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 268 uninjured
- Status: Completed, report December 3, 1975
- Report: Brief approved by the director
- NTSB case key (mKey): 151318
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=OAK76IP007
- Page: https://openairdocs.org/ntsb/OAK76IP007

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
4-0016  75/8/24    NO.PACIFIC OCEAN    BOEING 747          CR-  0  0 18  SCHED DOM PASSG SRV       AIRLINE TRANSPORT, AGE
        TIME - 1648                    N4735U              PX-  0  0250                            UNK/NR, UNK/NR TOTAL
                                       DAMAGE-MINOR        OT-  0  0  0                            HOURS, UNK/NR IN TYPE,
                                                                                                   INSTRUMENT RATED.
        CLASSIFIED AS INCIDENT
        OPERATOR - UNITED AIR LINES,INC.
        DEPARTURE POINT             INTENDED DESTINATION
          SAN FRANCISCO,CA            HONOLULU,HI
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: NORMAL CRUISE
           FIRE OR EXPLOSION: IN FLIGHT                             IN FLIGHT: NORMAL CRUISE
        PROBABLE CAUSE(S)
           POWERPLANT - COMPRESSOR ASSEMBLY: DISC, COMPRESSOR ROTOR
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
           MISCELLANEOUS ACTS,CONDITIONS - FIRE IN ENGINE
        COMPLETE POWER LOSS - COMPLETE ENGINE FAILURE/FLAMEOUT-1 ENGINE
        REMARKS- FIRE IN ENG COWL. 7TH STAGE COMPRESSOR DISC RIM SEPARATED.
```

## Aircraft

- Registration: [N4735U](https://openairdocs.org/deregistered/N4735U-1998-05-04), registration cancelled 1998-05-04, S/N 19928 (OpenAirDocs)
- Reported make and model: BOEING 747
- Registry model: [Boeing 747-122](https://openairdocs.org/model/boeing-747-122) (registry code 1384872) (OpenAirDocs)
- Category: Airplane
- Engines: turbo fan
- Damage: Minor damage

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

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