# N121PM: 1966 Dehavilland DHC-6 TWIN OTTER - Status: Valid registration - Airframe: [Dehavilland DHC-6 TWIN OTTER](https://openairdocs.org/model/dehavilland-dhc-6-twin-otter) (registry code 2802606, 16 seats) - Engine: [U/A Canada PT6 SER 578HP](https://openairdocs.org/engine/u-a-canada-pt6-ser-578hp) (registry code 61501) - Serial number: 14 - Year built: 1966 - Type: Fixed wing multi engine - Engine type: Turbo-prop - Certificate issued: October 17, 2016 - Expires: October 31, 2029 - Mode S code: A058BA - Registered owner: [Randigo LLC](https://openairdocs.org/faa-owner/RANDIGO%20LLC) - Location: [Wilmington, DE](https://openairdocs.org/faa-place/DE/Wilmington) - Owner type: LLC - Owner's area on the map: 39.7376° N, 75.6671° W: Placed by OpenAirDocs at the center of ZIP code 19808, within about 2 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based - FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=121PM - Page: https://openairdocs.org/aircraft/N121PM From the FAA registry file of October 24, 2026. ADs below are matched by the registry's airframe and engine model codes. They may apply; each AD's applicability can narrow it by serial number, part number or installed equipment. This is not a compliance determination. ## ADs that may apply (OpenAirDocs): 0 in force ### Matched by airframe (Dehavilland DHC-6 TWIN OTTER) None in force. ### Matched by engine (U/A Canada PT6 SER 578HP) None in force. ## Information bulletins (advisory) None matched. ## NTSB investigations (4) 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 LAX91FA052](https://openairdocs.org/ntsb/LAX91FA052), Dec 9, 1990: de Havilland DHC-6-100 (N121PM), Perris Valley, CA, substantial damage. Probable cause: A LOSS OF POWER ON THE LEFT ENGINE DUE TO A FATIGUE FAILURE OF A COMPRESSOR TURBINE BLADE LEADING TO FURTHER COMPRESSOR BLADE DAMAGE; A WORN POWER TURBINE GOVERNOR THROTTLE CAM ASSEMBLY WHICH LED TO… - [NTSB NYC71AN117](https://openairdocs.org/ntsb/NYC71AN117), Jun 4, 1971: Dehavilland DHC-6 (N121PM), Flushing, NY, minor damage - [NTSB NYC70AN096](https://openairdocs.org/ntsb/NYC70AN096), Mar 6, 1970: Dehavilland DHC-6 (N121PM), Windsor Lock, CT, substantial damage - [NTSB NYC67I0103](https://openairdocs.org/ntsb/NYC67I0103), Jan 19, 1967: Dehaviland DHC-6 (N121PM), Farmingdale, NY, incident, no damage ## FAA accident and incident reports (8) 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. - [Incident 20180602007519I](https://openairdocs.org/incident/20180602007519I), Jun 2, 2018: Dehavilland DHC-6 TWIN OTTER (N121PM), Orange, MA, No damage, 1 fatal. June 4, 2018 at approximately 11:50 am FAA c-roc notified inspector wilson of a fatal parachute incident which occurred on Saturday June 2, 2018, at Orange… - [Incident 20121121024769I](https://openairdocs.org/incident/20121121024769I), Nov 21, 2012: Dehavilland DHC-6 TWIN OTTER (N121PM), Williamstown, NJ, No damage, 1 fatal. At approximately 1434 hours a call was received from a farmer to the monroe township, NJ police department. The farmer found a skydiver in his field. The… - [Incident 20121111023519I](https://openairdocs.org/incident/20121111023519I), Nov 11, 2012: Dehavilland DHC-6 TWIN OTTER (N121PM), Williamstown, NJ, No damage. At approximately 10:30 am, [privacy data omitted], 54, a licensed skydiver, made a skydive in Williamstown, NJ at skydive Cross Keys. He exited the plane… - [Incident 20120930019759I](https://openairdocs.org/incident/20120930019759I), Sep 30, 2012: Dehavilland DHC-6 TWIN OTTER (N121PM), Williamstown, NJ, No damage. At approximately 12:30PM, a licensed skydiver who holds a uspa c-license with about approximately 255 jumps, made a skydive in Williamstown, NJ at skydive… - [Incident 20120922021189I](https://openairdocs.org/incident/20120922021189I), Sep 22, 2012: Dehavilland DHC-6 TWIN OTTER (N121PM), Williamstown, NJ, No damage. At approximately 12:00PM,[privacy data omitted] a licensed skydiver with about 50 jumps, made a skydive in Williamstown, NJ at skydive Cross Keys. The skydiver… - [Incident 20120811018789I](https://openairdocs.org/incident/20120811018789I), Aug 11, 2012: Dehavilland DHC-6 TWIN OTTER (N121PM), Williamstown, NJ, No damage. 1. Name of jumper: [privacy data omitted]2. Experience & training of jumper: 1400 jumps and has a "d" license from the USPA3. Club affiliation: NONE4.… - [Accident 19901209053309A](https://openairdocs.org/incident/19901209053309A), Dec 9, 1990: Dhav DHC6100 (N121PM), Perris, CA, Substantial damage. Lost left engine after liftoff. Aborted. Overran open field into trees. Left turbine failed. Right engine problem. - [Incident 19850924065669I](https://openairdocs.org/incident/19850924065669I), Sep 24, 1985: Dhav DHC6TWNOTTER (N121PM), New Haven, CT. Cockpit filled with smoke from windshield wiper heat control panel. Resistor had burned out on low speed wiper. ## Service difficulty reports None filed for this aircraft. Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model. ## STCs that may be installed (OpenAirDocs) None matched to this aircraft's models. ## Related - Other Dehavilland DHC-6 TWIN OTTER aircraft: https://openairdocs.org/model/dehavilland-dhc-6-twin-otter/aircraft.md - The U/A Canada PT6 SER 578HP engine: https://openairdocs.org/engine/u-a-canada-pt6-ser-578hp.md --- 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.