# N21SP: not currently registered

- Registered now: No (not in the FAA registry file). The mark may be reserved or free to assign
- Earlier aircraft: 1
- Last cancelled: March 10, 1999
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=21SP
- Page: https://openairdocs.org/aircraft/N21SP

## Aircraft that carried N21SP

- [Cancelled 1999-03-10](https://openairdocs.org/deregistered/N21SP-1999-03-10): Pilgrim STEEN SKYBOLT, S/N P3. Triennial form not returned. Owner: [Zabriskie Cedric J](https://openairdocs.org/faa-owner/ZABRISKIE%20CEDRIC%20J), [Chehalis, WA](https://openairdocs.org/faa-place/WA/Chehalis)

## NTSB investigations on N21SP (3)

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 DFW08TA128](https://openairdocs.org/ntsb/DFW08TA128), Apr 25, 2008: Beech C90 (N21SP), Baton Rouge, LA, substantial damage. Probable cause: Structural failure of the right main landing gear torque knee. A contributing factor was the failure to inspect the torque knee at the designated interval.
- [NTSB SEA98LA147](https://openairdocs.org/ntsb/SEA98LA147), Jul 24, 1998: Pilgrim Steen Skybolt (N21SP), Curtis, WA, substantial damage. Probable cause: Loss of control for undetermined reasons.
- [NTSB DEN89LA006](https://openairdocs.org/ntsb/DEN89LA006), Oct 4, 1988: Pilgrim Steen Skybolt (N21SP), Rawlins, WY, substantial damage

## FAA accident and incident reports on N21SP (4)

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.

- [Accident 20080425839969A](https://openairdocs.org/incident/20080425839969A), Apr 25, 2008: Beech C90 (N21SP), Baton Rouge, LA, Substantial damage. (-23) Upon landing the right main landing gear upper torque knee broke causing the right tire to turn sideways and came out of the upper trunnion causing the…
- [Accident 19980724024849A](https://openairdocs.org/incident/19980724024849A), Jul 24, 1998: Amtr SKYBOLT (N21SP), Curtis, WA, Substantial damage. .4)The pilot, who owned the airplane and was an experienced aerobatic pilo t, stated that he had taken off, accelerated along the runway, then pitched up to…
- [Incident 19940512015889I](https://openairdocs.org/incident/19940512015889I), May 12, 1994: Amtrsn SKYBOLT (N21SP), Hickory, NC, Minor damage. Pilot landed while another aircraft was departing in opposite direction. Wake turbulence caused gear collapse.
- [Accident 19881004044249A](https://openairdocs.org/incident/19881004044249A), Oct 4, 1988: Amtrsn SKYBOLT (N21SP), Rawlings, WY, Substantial damage. Bounced landing, tried to go around. Stalled, hit runway and ground looped.

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