AD 72-07-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Textron Aviation Inc. | DH.125 Series 1A | Airworthiness Directives; HAWKER SIDDELEY AVIATION Models DH.125-1A, -1A/522, -1A/R-522, -1A/S-522, -3A, -3A/R, -3A/RA, and -400A Airplanes |
| aircraft | Textron Aviation Inc. | DH.125 Series 1A-522 | Airworthiness Directives; HAWKER SIDDELEY AVIATION Models DH.125-1A, -1A/522, -1A/R-522, -1A/S-522, -3A, -3A/R, -3A/RA, and -400A Airplanes |
| aircraft | Textron Aviation Inc. | DH.125 Series 1A/R-522 | Airworthiness Directives; HAWKER SIDDELEY AVIATION Models DH.125-1A, -1A/522, -1A/R-522, -1A/S-522, -3A, -3A/R, -3A/RA, and -400A Airplanes |
| aircraft | Textron Aviation Inc. | DH.125 Series 1A/S-522 | Airworthiness Directives; HAWKER SIDDELEY AVIATION Models DH.125-1A, -1A/522, -1A/R-522, -1A/S-522, -3A, -3A/R, -3A/RA, and -400A Airplanes |
| aircraft | Textron Aviation Inc. | DH.125 Series 3A | Airworthiness Directives; HAWKER SIDDELEY AVIATION Models DH.125-1A, -1A/522, -1A/R-522, -1A/S-522, -3A, -3A/R, -3A/RA, and -400A Airplanes |
| aircraft | Textron Aviation Inc. | DH.125 Series 3A/R | Airworthiness Directives; HAWKER SIDDELEY AVIATION Models DH.125-1A, -1A/522, -1A/R-522, -1A/S-522, -3A, -3A/R, -3A/RA, and -400A Airplanes |
| aircraft | Textron Aviation Inc. | DH.125 Series 3A/RA | Airworthiness Directives; HAWKER SIDDELEY AVIATION Models DH.125-1A, -1A/522, -1A/R-522, -1A/S-522, -3A, -3A/R, -3A/RA, and -400A Airplanes |
| aircraft | Textron Aviation Inc. | DH.125 Series 400A | Airworthiness Directives; HAWKER SIDDELEY AVIATION Models DH.125-1A, -1A/522, -1A/R-522, -1A/S-522, -3A, -3A/R, -3A/RA, and -400A Airplanes |
Unsafe Condition
Possible seizure of the windscreen de-icing handpump No. M.2604.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace the washers and seal with pre-Modification 252052 parts per Hawker Siddeley Service Bulletin No. 30-24-(2194) or replace the pump with new pump No. M.2601/1 per the same service bulletin.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within the next 100 hours' time in service after the effective date of this AD
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Affected Aircraft
HAWKER SIDDELEY AVIATION Models DH.125-1A, -1A/522, -1A/R-522, -1A/S-522, -3A, -3A/R, -3A/RA, and -400A airplanes modified with Hawker Siddeley Modification 252052.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Windscreen De-Icing Hand Jump
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_72-07-04.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 72-07-04 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; HAWKER SIDDELEY AVIATION Models DH.125-1A, -1A/522, -1A/R-522, -1A/S-522, ...Show more Subject: Windscreen De-Icing Hand Jump Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 04/15/1972 Make: Textron Aviation Inc. Model: DH.125 Series 1A | DH.125 Series 1A-522 | DH.125 Series 1A/R-522 | DH.125 Series 1A/S-522 | DH.125 S...Show more Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 72-07-04 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-1409 AD NUMBER: 72-07-04 SUBJECT HEADING: Airworthiness Directives; HAWKER SIDDELEY AVIATION Models DH.125-1A, -1A/522, -1A/R-522, -1A/S-522, -3A, -3A/R, -3A/RA, and -400A Airplanes ACTION: SUMMARY: DATES: Effective April 15, 1972. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 72-07-04 HAWKER SIDDELEY AVIATION: Amdt. 39-1409. Applies to Models DH.125-1A, -1A/522, -1A/R-522, -1A/S-522, -3A, -3A/R, -3A/RA, and -400A airplanes which have been modified in accordance with Hawker Siddeley Modification 252052. To prevent possible seizure of the windscreen de-icing handpump No. M.2604, within the next 100 hours' time in service after the effective date of this AD, unless already accomplished, accomplish either of the following: (a) Modify the pump by replacing the washers and seal with pre-Modification 252052 parts in accordance with Hawker Siddeley Service Bulletin No. 30-24-(2194), dated December 23, 1970, or later ARB-approved issue or FAA-approved equivalent; or (b) Replace the pump with a new pump No. M.2601/1 in accordance with Hawker Siddeley Service Bulletin No. 30-24-(2194), dated December 23, 1970, or later ARB-approved issue or FAA-approved equivalent. This amendment becomes effective April 15, 1972. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_72-07-04.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 72-07-04 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; HAWKER SIDDELEY AVIATION Models DH.125-1A, -1A/522, -1A/R-522, -1A/S-522, ...Show more Subject: Windscreen De-Icing Hand Jump Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 04/15/1972 Make: Textron Aviation Inc. Model: DH.125 Series 1A | DH.125 Series 1A-522 | DH.125 Series 1A/R-522 | DH.125 Series 1A/S-522 | DH.125 S...Show more Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 72-07-04 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-1409 AD NUMBER: 72-07-04 SUBJECT HEADING: Airworthiness Directives; HAWKER SIDDELEY AVIATION Models DH.125-1A, -1A/522, -1A/R-522, -1A/S-522, -3A, -3A/R, -3A/RA, and -400A Airplanes ACTION: SUMMARY: DATES: Effective April 15, 1972. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 72-07-04 HAWKER SIDDELEY AVIATION: Amdt. 39-1409. Applies to Models DH.125-1A, -1A/522, -1A/R-522, -1A/S-522, -3A, -3A/R, -3A/RA, and -400A airplanes which have been modified in accordance with Hawker Siddeley Modification 252052. To prevent possible seizure of the windscreen de-icing handpump No. M.2604, within the next 100 hours' time in service after the effective date of this AD, unless already accomplished, accomplish either of the following: (a) Modify the pump by replacing the washers and seal with pre-Modification 252052 parts in accordance with Hawker Siddeley Service Bulletin No. 30-24-(2194), dated December 23, 1970, or later ARB-approved issue or FAA-approved equivalent; or (b) Replace the pump with a new pump No. M.2601/1 in accordance with Hawker Siddeley Service Bulletin No. 30-24-(2194), dated December 23, 1970, or later ARB-approved issue or FAA-approved equivalent. This amendment becomes effective April 15, 1972. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.
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