# NTSB DIA69I0050: Boeing 727, N4618H, Wash Natl Apt, DC, March 23, 1969

- Type: NTSB incident investigation
- Classification: Incident · Minor injuries · Closed
- Date: March 23, 1969
- Place: Wash Natl Apt, DC · WASH NATL APT, DC
- Phase of flight: [Taxi](https://openairdocs.org/ntsb-phases/250) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 2 minor, 99 uninjured
- Status: Completed, report July 14, 1969
- Report: Brief approved by the director
- NTSB case key (mKey): 185803
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DIA69I0050
- Page: https://openairdocs.org/ntsb/DIA69I0050

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
4-0011  69/3/23    WASH NATL APT,DC    BOEING 727          CR-  0  0  6  SCHED DOM PASSG SRV       CERTIFICATE UNKNOWN, AGE
        TIME - 1710                    N4618H              PX-  0  0 95                            UNK/NR, UNK/NR TOTAL
                                       DAMAGE-NONE         OT-  0  0  0                            HOURS, UNK/NR IN TYPE,
                                                                                                   UNK/NR INSTRUMENT RATED.
        CLASSIFIED AS INCIDENT
        NAME OF AIRPORT - WASH. NATL APT
        OPERATOR - NATIONAL AIRLINES,INC
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           FIRE OR EXPLOSION: ON GROUND                             TAXI: FROM LANDING
        REMARKS- STARTED APU. DENSE SMOKE CAUSED BY INTERMITTENT CIRCUIT IN GRND COOLING FAN. HEATED DUCTING.
```

## Aircraft

- Registration: N4618H (not matched to a registry record)
- Reported make and model: BOEING 727
- Category: Airplane
- Engines: turbo fan
- Damage: No damage
- Airport: Wash. Natl Apt

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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