# AD 72-18-04: VNE Limitations

- Type: Airworthiness directive
- Status: Current
- Products: MD Helicopters 369H, 369HE, 369HM and 369HS
- Effective: August 31, 1972
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Rotorcraft
- Amendment: 39-1509
- Registered aircraft: 79 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/2B33B218B099CEC086256A39004959AA.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/72-18-04

## The airworthiness directive

72-18-04 HUGHES: Amendment 39-1509. Applies to Model 369H Series; Model 369HE, Serial Nos. 0101E thru 0215E, Model 369HM, Serial Nos. 0101M thru 0213M, Model 369HS, Serial Nos. 0101S thru 0357S Helicopters certified in all categories.

Compliance required within the next 25 hours time in service after the effective date of this AD, unless already accomplished.

To eliminate the possibility of exceeding the correct Vne limitations above 3000 feet density altitude, accomplish the following:

  (a) Install new Vne placards in accordance with Hughes Service Information Notice No. HN-45, dated 29 February 1972, or later FAA-approved revisions, or an equivalent installation approved by the Chief, Aircraft Engineering Division, FAA Western Region. New placards are available from the Manufacturer and Service Centers.

  (b) Revise Rotorcraft Flight Manual with RFM revision dated 2 November 1971. RFM revisions are available from the Manufacturer and Service Centers.

This amendment becomes effective August 31, 1972.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS H3WE](https://openairdocs.org/tcds/H3WE): MD Helicopters LLC; names 4 of 12 models: 369HS, 369HM, 369HE, 369H

## Registered aircraft it may apply to (OpenAirDocs)

Matched by airframe and engine model; the AD's applicability may narrow it by serial number, part number or equipment.

- Aircraft: 79 (79 by airframe model, 0 by engine model)
- Makers: Hughes 73, MD Helicopters 5, Summa 1

Models with the most aircraft:

- [Hughes 369HS](https://openairdocs.org/model/hughes-369hs): 69 aircraft (airframe model)
- [MD Helicopters 369HS](https://openairdocs.org/model/md-helicopters-369hs): 3 aircraft (airframe model)
- [Hughes 369HE](https://openairdocs.org/model/hughes-369he): 3 aircraft (airframe model)
- [MD Helicopters 369HM](https://openairdocs.org/model/md-helicopters-369hm): 2 aircraft (airframe model)
- [Summa 369HS](https://openairdocs.org/model/summa-369hs): 1 aircraft (airframe model)
- [Hughes 369H](https://openairdocs.org/model/hughes-369h): 1 aircraft (airframe model)

All 6 models: https://openairdocs.org/ad/72-18-04/models.md
Every aircraft: https://openairdocs.org/ad/72-18-04/aircraft.md

Its text cites no advisory circulars or STCs.

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