# Incident 19861218075279I: Boeing 727231, St Louis, MO, December 18, 1986

- Type: FAA incident report (Accident/Incident Data System), as reported
- Date: December 18, 1986, 18:54 local time
- Place: St Louis, MO
- Damage: No damage
- Phase of flight: Normal Cruise
- Operating rules: Air carrier (Part 121)
- Operator: TWAA
- Location: 38.6273° N, 90.1979° W: Placed by OpenAirDocs: center of St. Louis, MO, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=38.6273&lon=-90.1979&mi=10
- Aircraft: N12306, a cancelled registration (https://openairdocs.org/deregistered/N12306-1996-08-26) (OpenAirDocs)
- Registry model: Boeing 727-231 (registry code 1384079, https://openairdocs.org/model/boeing-727-231) (OpenAirDocs)
- Reported make and model: BOEING 727231
- People aboard: 118
- Fatal injuries: 0
- Pilot flight hours: 0 total, 0 in this make and model, 0 in the last 90 days
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/19861218075279I

## Narrative

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

LOST A SYSTEM HYDRAULIC FLUID EN ROUTE. LANDED WITHOUT INCIDENT. FOUND POWER UNIT AND TRANSFER VALVE LEAKING.

## Other reports on N12306 (5)

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

- [Incident 19920709030629I](https://openairdocs.org/incident/19920709030629I), Jul 9, 1992: Boeing 727231 (N12306), Dallas-Ft Worth, TX, Minor damage. B system hydraulic system failure after takeoff. Returned. Found tire tread had separated and damaged hydraulic tube
- [Incident 19911114059319I](https://openairdocs.org/incident/19911114059319I), Nov 14, 1991: Boeing 727231 (N12306), Santa Ana, CA. Pilot received a TCAS warning and reacted by descending to lower altitude. ATC advised traffic. Pilot didnot see.
- [Incident 19880511021959I](https://openairdocs.org/incident/19880511021959I), May 11, 1988: Boeing 727231 (N12306), St Louis, MO. Hydraulic quantity and pressure lost on approach. Cranked gear down. Seal plate packing on lower rudder pcu failed.
- [Incident 19850815044629I](https://openairdocs.org/incident/19850815044629I), Aug 15, 1985: Boeing 727231 (N12306), St Louis, MO. Shutdown engine en route when start valve light came on. Uneventful landing. Replaced valve and pressure switch.
- [Incident 19800729063129I](https://openairdocs.org/incident/19800729063129I), Jul 29, 1980: Boeing 727231 (N12306), Pittsburgh, PA. Oil pressure dropping in climb to cruise, engine shut down. No. 6 main bearing transfer tube cracked.

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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