ANC04LA040 · Piper PA-12
Piper PA-12 · Accident: partial loss of engine power (non-mechanical) during initial climb
From Copper Center, AK to Valdez Pioneer Field (VDZ)
Event
- NTSB case
- ANC04LA040
- Event typeAccident: someone killed or seriously injured, or the aircraft substantially damaged (NTSB definition). Incident: an occurrence that affected or could have affected safety, short of that. Glossary
- Accident
- InvestigationHow far the investigation had got when the record was published: preliminary, ongoing, final or completed. Unknown where the source does not say. Glossary
- Completed
- API-reported fatalities
- 0 · all aircraft and ground
- Ground fatalities
- Unknown
- OperationWhat kind of flying it was, grouped by the rules it flew under: airline (US Part 121), air taxi and commuter (Part 135), general aviation (Part 91 and similar), military or government. Glossary
- General aviation
- WeatherVisual meteorological conditions (VMC): good enough to fly by looking outside. Instrument conditions (IMC): cloud or low visibility, flying by instruments. Glossary
- Visual Meteorological Cond
Piper PA-12
- Aircraft type
- Piper PA-12
- Category
- Airplane
- RegistrationThe aircraft's tail number, such as N12345 or G-ABCD. Registrations are reissued, so the same one years apart can be a different aircraft. Glossary
- N3029M
- Operator
- Unknown
- Onboard fatalities
- Unknown
- Route
- From Copper Center, AKTo Valdez Pioneer Field (VDZ), Valdez, AK
- Aircraft age
- Not recorded
- Flight rulesThe regulations the flight operated under: in the US, Part 91 (general aviation), Part 121 (airlines), Part 135 (air taxi and commuter) and others; for flights abroad, the NTSB's coarser commercial or non-commercial code. Glossary
- Part 91: General Aviation
- Phase of flightThe stage of the flight when things started to go wrong: standing, taxi, takeoff, initial climb, en route, maneuvering, approach or landing. Glossary
- Initial climb
- First occurrenceThe single coded event the NTSB judges best describes what happened (records from 2008 on). Older records name the first occurrence in the sequence instead. Glossary
- Partial loss of engine power (non-mechanical)
- DamageDestroyed: beyond practical repair. Substantial: damage that affects the structure, performance or handling and normally needs major repair. Minor: less than that. Glossary
- Substantial
Cause areas
- Pilot in command › Carburetor heat, not used
- Pilot in command › Unsuitable terrain or takeoff/landing/taxi area, selected
Approximate · Coordinates from the NTSB case API, which marks them as estimated or does not say; no uncertainty radius is established.
NTSB narrative
Following completion of an annual inspection, the private certificated pilot departed a private airstrip located adjacent to the maintenance facility. The airstrip was muddy and wet, with puddles of standing water. The pilot said the sky condition was about 5,500 feet overcast, visibility was about 50 miles, and the temperature was about 45 degrees F. During takeoff, the pilot said that he encountered a puddle of water that splashed over the windshield. After takeoff, about 50 feet above the ground, the engine power began to slowly decrease. There was no engine roughness or sputtering. As the engine rpm decreased, the airplane lost altitude, and the pilot selected an emergency landing area in a snow-covered field. During landing in the snow, the airplane spun to the left, the right main landing gear collapsed, and the right wing struck the ground. The pilot said the airplane received damage to the right gear, the right wing, and the fuselage. The airplane was retrieved and examined by the maintenance facility mechanic and the pilot. No mechanical malfunction was found. The mechanic reported to an FAA inspector that during the takeoff roll the airplane encountered several puddles of water. The mechanic also indicated that "the temperature and environmental conditions were ideal for carburetor icing, and poor runway conditions were a contributing factor in the accident."
Probable cause
The pilot's selection of unsuitable terrain for takeoff, and his failure to utilize carburetor heat, which resulted in a loss of engine power during takeoff initial climb, and a subsequent encounter with snow-covered terrain. Factors contributing to the accident were standing water puddles that washed over the airplane during takeoff, and carburetor icing conditions.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record ANC04LA040
- Event ID
- 20040419X00478
- Case number
- ANC04LA040
- Dataset
- historical-pre2008
- Source SHA-256
- 89e2df6d848e7ab3b42e7d7c7a03ff403303057a26ca04c95b3ea67201c3ce74
Source notes (4)
- Unreviewed is an editorial label, not an investigation status. API-sourced is not report-checked or human-reviewed. Explicit event totals are used without summing aircraft injury tables; onboard allocation is withheld. Unknown values remain unknown. The operation category is mapped from the NTSB-reported FAR part and has not been reviewed.
- Filled from the NTSB case API where the bulk record had no value: investigation status, coordinates. Values present in the bulk record are kept.
- The date is the local date, which is the same as the UTC date the NTSB stores.
- API snapshot SHA-256: d794e936a41a91bf25e3d2bd24fecde8979c73e99feac7f37f96bcd9ca9aa452; retrieved 2026-09-21T19:15:49.498Z.