# AD 72-07-03: Main Air Reservoir Assemblies

- Type: Airworthiness directive
- Status: Current
- Products: de Havilland Aircraft Co., Ltd., The D.H.114 Heron Series 2A, D.H.114 Heron Series 2DA and D.H.114 Heron Series 2X
- Effective: September 1, 1972
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small/large airplane
- Amendment: 39-1486
- Registered aircraft: 1 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/13911E8AE64DED5B862569A80071CB56.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/72-07-03

## The airworthiness directive

72-07-03 HAWKER SIDDELEY AVIATION, LTD.: Amdt. 39-1408 as amended by Amendment 39-1486. Applies to Hawker Siddeley Model DH-114 Series 2 "Heron" airplanes.

Compliance is required on or before September 1, 1972.

To prevent possible failure of the air bottles, P/N B.2994, used in the two main air reservoir assemblies, P/N C.51626, of the pneumatic system, replace the main air reservoir assemblies, P/N C.51626, located in the fuselage nose with serviceable assemblies, P/N SAS.388- 001, containing air bottles P/N BAT.205-001.

(Hawker Siddeley Technical News Sheet, Series: Heron (114) No. S.7., Issues 1 and 2, dated June 21, 1971, and September 28, 1971, respectively, cover this same subject.)

Amendment 39-1408 became effective April 15, 1972.

This amendment 39-1486 is effective upon publication in the Federal Register as to all persons except those persons to whom it was made immediately effective by telegram dated May 31, 1972, which contained this amendment.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A-816](https://openairdocs.org/tcds/A-816): Acro Aeronautical Services Ltd; names 3 of 3 models: D.H.114 Heron Series 2DA, D.H.114 Heron Series 2A, D.H.114 Heron Series 2X

## 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: 1 (1 by airframe model, 0 by engine model)
- Makers: Dehavilland 1

Models with the most aircraft:

- [Dehavilland DH 114 HERON 2X](https://openairdocs.org/model/dehavilland-dh-114-heron-2x): 1 aircraft (airframe model)

All 1 models: https://openairdocs.org/ad/72-07-03/models.md
Every aircraft: https://openairdocs.org/ad/72-07-03/aircraft.md

Its text cites no advisory circulars or STCs.

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