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Type Record · As of May 3, 2026

MCDONNELL DOUGLAS HELI CO 500-E

Rotorcraft · ALLISON 250-C20 SER

Registered

4

Year Range

1988–1999

NTSB Events

2

Airworthiness Directives

0

Aircraft Resources

Engine · Rolls-Royce M250 (Allison) → Search FAA TCDS →

01 /  Distribution

Where the fleet lives and was built

Counts of currently-registered MCDONNELL DOUGLAS HELI CO 500-E aircraft by US state and decade of manufacture, sourced from the FAA Aircraft Registry.

By State (top 10)

  • MT 25.0% 1
  • WA 25.0% 1
  • FL 25.0% 1
  • CA 25.0% 1

By Decade of Manufacture

  • 1980s 25.0% 1
  • 1990s 25.0% 1
  • Unknown 50.0% 2

02 /  NTSB Records

Events involving MCDONNELL DOUGLAS HELI CO 500-E aircraft

2 event(s) on file. Showing the most recent 2.

03 /  Airworthiness Directives

FAA directives applicable to MCDONNELL DOUGLAS HELI CO 500-E

No matching airworthiness directives are on file for this make and model in the Federal Register.

06 /  Supplemental Type Certificates

Modifications approved for MCDONNELL DOUGLAS HELI CO 500-E

13 STCs on file — every FAA-approved modification, alteration, or installation for this aircraft. STOL kits, avionics, fuel systems, floats, engine swaps, you name it.

  • 11/06/2010

    STC ST03885AT

    Installation of Avionica Inc Cellular module

    Archeion Holdings LLC

    Atlas STC → DRS ↗

  • 10/04/2010

    STC ST03885AT

    Installation of Avionica Inc Cellular module

    Archeion Holdings LLC

    Atlas STC → DRS ↗

  • 09/21/2010

    STC ST02472AT

    Installation of a mini Quick Access Recorder (QAR).

    Archeion Holdings LLC

    Atlas STC → DRS ↗

  • 04/16/2009

    STC ST02540AT-D (1)

    Installation of replacement fuel tank sealant system

    FFC Manufacturing

    Atlas STC → DRS ↗

  • 07/20/2006

    STC ST00844WI-D

    Modification of Collins TCAS II or TCAS-94 (TCAS II) system installation with Collins TTR-920 Change 7.0 Receiver Transmitter to a Collins TCAS II or TCAS-94 OTCAS II) system insta…

    Rockwell Collins Inc

    Atlas STC → DRS ↗

  • 03/06/2006

    STC ST00961LA

    Installation of Mass Systems fire extinguisher cartridges as replacements for Kidde fire extinguisher cartridges in fire extinguisher bottles.

    Mass Systems Inc.

    Atlas STC → DRS ↗

  • 01/24/2005

    STC SA2693NM

    Installation of Electronics International digital volt/amp gauges and accessories.

    Electronics International Inc.

    Atlas STC → DRS ↗

  • 12/14/2004

    STC ST00844WI-D

    Modification of Collins TCAS II or TCAS-94 (TCAS II) system installation with Collins TTR-920 Change 7.0 Receiver Transmitter to a Collins TCAS II or TCAS-94 OTCAS II) system insta…

    Rockwell Collins Inc

    Atlas STC → DRS ↗

  • 12/01/2003

    STC ST00961LA

    Installation of Mass Systems fire extinguisher cartridges as replacements for Kidde fire extinguisher cartridges in fire extinguisher bottles.

    Mass Systems Inc.

    Atlas STC → DRS ↗

  • 02/24/2003

    STC ST01142WI-D

    Modification of a single or dual Collins TDR-94 or TDR-94D Mode S Transponder System installation with CTL-92 control head to a Flight ID capable Collins TDR-94 or TDR-94D Mode S T…

    Rockwell Collins Inc

    Atlas STC → DRS ↗

  • 03/10/2000

    STC ST00844WI-D

    Modification of Collins TCAS II or TCAS-94 (TCAS II) system installation with Collins TTR-920 Change 7.0 Receiver Transmitter to a Collins TCAS II or TCAS-94 OTCAS II) system insta…

    Rockwell Collins Inc

    Atlas STC → DRS ↗

  • 05/20/1993

    STC SA2622NM

    Installation of Precise Flight Pulselite Control Unit in landing/taxi system. (767-200 B17) (DHC-8 101)

    Precise Flight Inc

    Atlas STC → DRS ↗

  • 01/26/1988

    STC SA2693NM

    Installation of Electronics International digital volt/amp gauges and accessories.

    Electronics International

    Atlas STC → DRS ↗

04 /  Regulations watching this type

Advisory Circulars and Federal Register activity for MCDONNELL DOUGLAS HELI CO 500-E

05 /  Aircraft of this type

All 4 registered N-numbers

Every tail currently on the FAA registry for this make/model. Click an N-number to query the FAA Aircraft Inquiry; rows flagged ● have NTSB events on file. Tails seeded with full TallyAero pages link directly.

4 of 4
N-number St Year NTSB FAA
N177T MT — ● Look up ↗
N588HW WA — · Look up ↗
N694AT FL 1988 · Look up ↗
N987CB CA 1999 · Look up ↗

Source — FAA Aircraft Registry · click "Look up" to query the live registry record (owner, address, last airworthiness)

05 /  Sources & Methodology

Every count traces back to a primary US-government source

We render counts and lists as the agency publishes them. Read the methodology →