# Accident 20110626013549A: Christen Industries Inc PITTS S-1T, Alkali Lake, OR, June 26, 2011

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: June 26, 2011, 10:15 local time
- Place: Alkali Lake, OR
- Damage: Destroyed
- Phase of flight: Cruise/Level Flight
- Operating rules: General operating rules (Part 91)
- Location: 43.1664° N, 119.4842° W: From the FAA
- Nearby events: https://openairdocs.org/map.md?lat=43.1664&lon=-119.4842&mi=10
- Aircraft: N77MN, a cancelled registration (https://openairdocs.org/deregistered/N77MN-2014-09-16) (OpenAirDocs)
- Registry model: Christen Industries PITTS S-1T (registry code 2210002, https://openairdocs.org/model/christen-industries-pitts-s-1t) (OpenAirDocs)
- Registry engine: Amateur-built UNKNOWN ENG (registry code 99999, https://openairdocs.org/engine/amateur-built-unknown-eng) (OpenAirDocs)
- Reported make and model: CHRISTEN INDUSTRIES INC PITTS S-1T
- Reported engine: AMA/EXPR AEIO-360-A1E
- People aboard: 1
- Fatal injuries: 0
- Other injuries: 1
- Pilot certificates: Commercial pilot
- Pilot flight hours: 2,300 total, 1,800 in this make and model, 55 in the last 90 days
- NTSB investigation: [NTSB WPR11LA290](https://openairdocs.org/ntsb/WPR11LA290) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/20110626013549A

## Narrative

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

DURING CRUISE FLIGHT AT APPROX 6500 MSL THE PILOT EXPERIENCED A SUBSTANTIAL AMOUNT OF OIL ON THE WINDSCREEN. WITHIN ABOUT 5 SECONDS THE PILOT SCANNED THE INSTRUMENTS AND NOTICED A COMPLETE LOSS OF OIL PRESSURE. THE ENGINE RPM SURGED AND THE AIRCRAFT BEGAN TO LOSE ALTITUDE. THE AIRCRAFT ENGINE CONTINUED TO RUN BUT WAS NOT DEVELOPING POWER. THE AIRCRAFT CONTINUED TO DESCEND AND IMPACTED THE TERRAIN AT ABOUT 4800 MSL. THE AIRCRAFT WAS DESTROYED.

## The NTSB's investigation of this event (1)

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.

- [NTSB WPR11LA290](https://openairdocs.org/ntsb/WPR11LA290), Jun 26, 2011: Christen Industries Pitts S-1T (N77MN), Alkali Lake, OR, substantial damage. Probable cause: The loss of engine oil during cruise flight due to the failure of the front bearing oil seal.

## Other reports on N77MN (1)

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

- [Incident 20050502006249I](https://openairdocs.org/incident/20050502006249I), May 2, 2005: Amtr PITTSS1T (N77MN), Guymon, OK. (-23) During descent into Guymon for a fuel stop the aircraft began to vibrate extremely. The pilot stated she pulled the power and set the aircraft down in a…

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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