# NTSB ANC24LA057: Dehavilland-Kenmore DHC-2, N590DB, Juneau, AK, June 28, 2024

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Class 4 · Limited · Final report
- Date: June 28, 2024, 15:25 local (23:25 UTC)
- Place: Juneau, AK
- Coordinates: 58.354283, -134.60396
- Nearby events: https://openairdocs.org/map.md?lat=58.3543&lon=-134.6040&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Defining event: [Initial climb: Loss of engine power (partial)](https://openairdocs.org/ntsb-events/342)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed
- Report: Approved by Office Director
- Investigation class: Class 4 - Basic report with no Prelim publish
- NTSB office: Alaska Regional Office
- Parties: FAA/FSDO
- NTSB case key (mKey): 194588
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC24LA057
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/194588/pdf
- NTSB docket: https://data.ntsb.gov/Docket?ProjectID=194588
- Page: https://openairdocs.org/ntsb/ANC24LA057

## Probable cause

A partial loss of engine power during initial climb due to a cracked cylinder.

## Findings

NTSB's coded findings; those marked are part of the probable cause.

- [Engine (reciprocating): recip eng cyl section](https://openairdocs.org/ntsb-findings/01058530): Aircraft › Aircraft power plant · Failure (probable cause); cases with it: [Dehavilland-Kenmore DHC-2, 1 case](https://openairdocs.org/ntsb-findings/01058530/cases.md?model=2805001), [All aircraft, 373 cases](https://openairdocs.org/ntsb-findings/01058530/cases.md)

## Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event best describes what happened.

- [Initial climb: Loss of engine power (partial)](https://openairdocs.org/ntsb-events/342) (defining event); cases with it: [Dehavilland-Kenmore DHC-2, 1 case](https://openairdocs.org/ntsb-events/342/sequence.md?model=2805001), [All aircraft, 1,858 cases](https://openairdocs.org/ntsb-events/342/sequence.md)
- [Emergency descent: Off-field or emergency landing](https://openairdocs.org/ntsb-events/440); cases with it: [Dehavilland-Kenmore DHC-2, 1 case](https://openairdocs.org/ntsb-events/440/sequence.md?model=2805001), [All aircraft, 3,365 cases](https://openairdocs.org/ntsb-events/440/sequence.md)

## Analysis

The pilot reported after a normal takeoff in a float-equipped airplane, about treetop height, there was a loud bang and pulsing sensation, and the engine lost partial power. Unable to maintain altitude and return to the airport, the pilot performed a forced landing to the mud flats. The airplane sustained substantial damage to the elevator and horizontal stabilizer. Postaccident examination revealed the No. 9 cylinder was cracked. The last maintenance performed was about 90 hours before the accident, there were no anomalies noted at that time.

## Aircraft

- Registration: [N590DB](https://openairdocs.org/aircraft/N590DB), registered now, S/N 1412, built 1959 (OpenAirDocs)
- Reported make and model: DEHAVILLAND-KENMORE DHC-2
- Registry model: [Dehavilland-Kenmore DHC-2](https://openairdocs.org/model/dehavilland-kenmore-dhc-2) (registry code 2805001) (OpenAirDocs)
- Registry engine: [Pratt & Whitney R-985-AN-14B](https://openairdocs.org/engine/pratt-whitney-r-985-an-14b) (registry code 51654, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 1412
- Year built: 1959
- Airframe hours: 11594.6
- Engines: Pratt & Whitney R985-AN-14B 450 horsepower reciprocating
- Damage: Substantial damage
- Flight: Business, Part 91
- Operator: Lone Eagle Resorts, Inc., doing business as Pybus Point Lodge
- Registered owner: Admiralty Assets LLC
- Airworthiness certificate: Standard, Normal
- Last inspection: 100 hour, May 15, 2024, 89.7 hours before
- Destination: Angoon, AK
- Airport: JNU, Juneau Intl, runway 08W/26W, 4,800 × 150 ft, water
- Equipment: Electronic flight bag or handheld device, ADS-B

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 28; injuries: none; flight instructor, commercial; airplane ratings: multi-engine land, single-engine land, multi-engine sea, single-engine sea; instrument ratings: airplane; medical: class 1, without waivers/limitations; last flight review May 17, 2023; seat: left; restraint: 3-point; flight hours: 4,100 total, 600 in this make and model, 3,980 as pilot in command, 145 in the last 90 days, 80 in the last 30 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 230° at 10 knots
- Visibility: 10 statute miles
- Temperature: 73 °F, dew point 54 °F
- Altimeter: 29.89 inHg
- Observed at: AJN, 1 nm away
- METAR: PAJN 282253Z 23010KT 10SM FEW060 SCT130 SCT240 23/12 A2989 RMK AO2 SLP122 T02330117

## 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 20240628007899A](https://openairdocs.org/incident/20240628007899A), Jun 28, 2024: Dehavilland-Kenmore DHC-2, Juneau, AK, Substantial damage. On June 28th, 2024 at 13:25 [privacy data omitted] on floats departed jnu float pond when upon takeoff climb out had engine loss of power. Pilot declared…

## Docket (3 files)

The files NTSB released with the investigation on March 28, 2025, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=194588. 4.0 MB in all.

- Pilot/operator aircraft accident report, NTSB form 6120.1 (item 1, PDF, 11 pages, 2.3 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=17344303&FileExtension=pdf&FileName=6120%20Pilot_Operator%20Aircraft%20Accident_Incident%20Report%20-%20N590DB_Redacted-Rel.pdf
- Maintenance records (item 2, PDF, 3 pages, 444 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=17344637&FileExtension=pdf&FileName=Maintenance%20Records_Redacted-Rel.pdf
- Photos (item 3, PDF, 4 pages, 1.3 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=17344086&FileExtension=pdf&FileName=Photos-Rel.pdf

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.

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