# NTSB SEA97LA164: Piper PA-18-135, N3253B, Biddle, MT, July 8, 1997 - Type: NTSB accident investigation - Classification: Accident · Minor injuries · Limited investigation · Final report - Date: July 8, 1997, 08:15 local (14:15 UTC) - Place: Biddle, MT - Coordinates: 45.079711, -105.370506 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=45.0797&lon=-105.3705&mi=10 - Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping) - Highest injury: Minor injuries - Injuries: 2 minor - Status: Completed, report January 28, 2000 - Report: Approved by Office Director - NTSB case key (mKey): 42653 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA97LA164 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/42653/pdf - Page: https://openairdocs.org/ntsb/SEA97LA164 ## Probable cause The pilot-in-command's failure to maintain adequate airspeed which resulted in a stall/mush. A factor contributing to the accident was the tailwind condition on takeoff. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Loss of control - in flight, maneuvering - weather condition - tailwind (contributing factor) - airspeed - inadequate, pilot in command (cause) - stall/mush - inadvertent, pilot in command - In flight collision with terrain/water, descent - uncontrolled - terrain condition - ground ## Analysis The pilot took off downhill and to the northeast with a left quartering tail wind from the southwest of approximately 5-8 knots. Shortly thereafter the aircraft crossed over a bluff where the terrain dropped off, and passed over an area populated with deciduous trees. The aircraft began to settle and the pilot executed a left turn toward the west. Just after the aircraft cleared the tree line, it impacted the ground left wing and nose low, coming to rest 49 feet beyond the initial ground impact point. A post crash fire developed and the pilot and his wife exited with minor injuries. ## Factual narrative On July 8, 1997, approximately 0815 mountain daylight time, a Piper PA-18-135, N3253B, registered to and being flown by a private pilot, was destroyed during an inflight collision with terrain while maneuvering, immediately after takeoff at a private airstrip approximately six miles north of Biddle, Montana. The pilot and his wife sustained minor injuries. Visual meteorological conditions prevailed and no flight plan had been filed. The flight, which was personal, was to have been operated under 14CFR91, and was destined for the pilot's residence airstrip, 18 miles north of Ashland, Montana. The pilot was interviewed by an inspector from the Federal Aviation Administration's (FAA) Flight Standards District office, Helena, Montana (refer to ATTACHMENT I). Accordingly, the pilot reported that he took off downhill and to the northeast with a left quartering tail wind from the southwest of approximately 5-8 knots. He rotated at between 40-45 miles per hour and shortly thereafter crossed over a bluff where the terrain dropped off and passed over an area populated with deciduous trees (refer to photograph 1). Upon crossing over the trees, the aircraft begain to settle, and the pilot entered a left turn toward the west. Shortly after clearing the tree line, the aircraft impacted the terrain, slid to a stop, and then caught fire. The pilot and his wife exited the aircraft, and shortly thereafter, the aircraft was consumed by the post crash fire. The FAA inspector examined both the takeoff area and the crash site. He reported that the aircraft came to rest approximately 90 feet south of the edge of the tree line and approximately 600 feet north of the bluff. The distance between the initial ground impact site and the aircraft's final resting place was approximately 49 feet. The initial ground impact site had several pieces of landing light Plexiglas scattered on the ground. The aircraft's landing light was installed in the leading edge of the left wing just outboard of the strut attach point. The left wing was observed to be deformed upwards at this location, with some twist evident (refer to photograph 2). The aircraft's detached propeller and spinner were observed approximately 24 feet south of the initial ground impact site near a ground impression that match the shape of the propeller spinner (refer to photograph 3). The pilot reported that there was no mechanical malfunction with the aircraft or its powerplant. ## Aircraft - Registration: N3253B (not matched to a registry record) - Reported make and model: Piper PA-18-135 - Category: Airplane - Serial number: 18-3270 - Engines: Lycoming O-290-02 135 horsepower reciprocating - Damage: Destroyed - Fire: On-Ground - Flight: Personal, Part 91 - Registered owner: Allison, William, L. - Airworthiness certificate: Standard, Normal - Last inspection: Annual, September 23, 1996 - Destination: BRANDENBERG, MT ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 47; private; airplane ratings: single-engine land; medical: class 2, expired; seat: front; flight hours: 1,130 total, 300 in this make and model ## Weather - Conditions: Visual (VMC), Day - Lowest ceiling: none - Temperature: 79 °F ## FAA reports on this event (1) The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs). - [Accident 19970708017399A](https://openairdocs.org/incident/19970708017399A), Jul 8, 1997: Piper PA18135, Biddle, MT, Destroyed. Aircrat took off, lost power, turned back, stalled, crashed and burned. 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. --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.