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.
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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.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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