# Incident 19790427025199I: Boeing 727, San Antonio, TX, April 27, 1979

- Type: FAA incident report (Accident/Incident Data System), as reported
- Date: April 27, 1979, 22:20 local time
- Place: San Antonio, TX
- Airport: International
- Phase of flight: Climb
- Operating rules: Air carrier (Part 121)
- Operator: BNF
- Location: 29.4241° N, 98.4936° W: Placed by OpenAirDocs: center of San Antonio, TX, within about 13 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=29.4241&lon=-98.4936&mi=10
- Aircraft: N437BN (not matched to a registry record)
- Reported make and model: BOEING 727
- People aboard: 26
- Fatal injuries: 0
- Pilot flight hours: 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/19790427025199I

## Narrative

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

HYDRAULIC SYSTEM PRESSURE WENT TO ZERO DUE TO FAULTY FLAP CONTROL VALVE.

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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