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Aircraft record

N955SD1996 Mcdonnell Douglas Helicopter 500N

DeregisteredUnclaimedSource: FAA, updated Oct 17, 2026

This N-number isn't registered right now. Below is its last known registration, canceled Jul 26, 2004.

Safety record in brief:1 NTSB accident (substantial damage, May 2000)3 ADs may apply

Registration
Deregistered
Last based in
Monterey Park, CA
owner city / state
Owners
1
since 1996
NTSB events
1
substantial, 2000
ADs may apply
3
confirm with A&P
Service reports
0
since 1995

Registration

FAA Aircraft Registry · Oct 17, 2026
Last registered owner
Los Angeles County Sheriffs Department
Owner type
Government
City, state
Monterey Park, CA
Certificate issued
Oct 10, 1996
Canceled
Jul 26, 2004
Airworthiness
Standard · Normal
Airworthiness date
May 10, 1996

We never show street addresses, even though they appear in the public FAA file. Individual owners are shown by city and state only.

Airframe & engine

FAA Registry + type data

Airframe

Manufacturer
Mcdonnell Douglas Helicopter
Model
500N
Year
1996
Serial number
LN080
Aircraft type
Rotorcraft
Category
Land
Certification
Type Certificated
Seats
4
Engines
1
Max takeoff weight
Up to 12,499 lb
Type certificate data sheet
H3WE
Mode S code
AD48CE

Engine

Make and model
Allison 250-C20 Ser
Type
Turbo-shaft
Power
420 hp

Total time and engine hours aren't public. They appear here once the owner adds logbooks.

Ownership history

Ownership history from FAA records
  1. 1996 – 2004Los Angeles County Sheriffs DepartmentMonterey Park, CA

Individual owners are shown by city and state only.

Safety record

NTSB · Oct 15, 2026 · FAA ADs · Oct 17, 2026 · SDRs · Oct 16, 2026

NTSB events (1)

Accident · substantial damage

May 8, 2000 · Los Angeles, CA

The combined failure of the operator management and the check pilot to ensure the landing area was suitable for the slide on landing. Factors were the high vegetation that entangled the skids, resulting in the abrupt stop and nose down movement of the helicopter, and the training pilot's inappropriate response to the nose pitch down.

Damage
Substantial
Injuries
None
Report
LAX00TA186

From NTSB records; matched by N-number.Read NTSB report (search CAROL for LAX00TA186)

Accident history for this model

ADs published since 1998 that may apply (3)

These match the airframe or engine model. Whether each one applies, and whether it's been complied with, depends on serial numbers, equipment and logbook entries. Applicability must be confirmed by a mechanic against the aircraft's records.

ADSubjectEffectiveApplies to
2006-16-04Rolls-Royce Corporation (Formerly Allison Engine Company, Allison Gas Turbine Division…Sep 7, 2006Engine (250-C20 SER)
2006-13-06Rolls-Royce Corporation (Formerly Allison Engine Company, Allison Gas Turbine Division…Jul 26, 2006Engine (250-C20 SER)Only with: Engines with gas producer rotor assembly tie bolt P/Ns A23008020, E23008020 (EXTEX), 23008020, 6843388, 6876991 (RRC), A23008020 (SAP), or 23008020P (Pacific Sky Supply) installed.
2005-10-13Rolls-Royce Corporation (Formerly Allison Engine Company) 250-B17B, -B17C, -B17D, -B17E…Jun 22, 2005Engine (250-C20 SER)Only with: Engines that do not have turbine energy absorbing ring RRC P/N 23035175, or an equivalent FAA-approved serviceable ring, installed.

AI-extracted — verify against original. Matched from each AD's applicability section; ADs replaced by a later AD are left out.

Service Difficulty Reports (0)

No Service Difficulty Reports found for this airframe since 1995.

Sources

  • FAA Aircraft RegistryRegistration, owner city and state, airframe, engineupdated Oct 17, 2026
  • NTSB accident and incident databaseAccidents and incidents since 1982updated Oct 15, 2026
  • FAA Airworthiness Directives (Federal Register)ADs published since 1998updated Oct 17, 2026
  • FAA Service Difficulty ReportsReports since 1995updated Oct 16, 2026

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