AD 90-08-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Textron Aviation Inc. | BAe.125 Series 800A | Airworthiness Directives; BRITISH AEROSPACE Model BH.125-600A, HS.125-700A, and BAe 125-800A Series Airplanes |
| aircraft | Textron Aviation Inc. | BAe.125 Series 800A (C-29A) | Airworthiness Directives; BRITISH AEROSPACE Model BH.125-600A, HS.125-700A, and BAe 125-800A Series Airplanes |
| aircraft | Textron Aviation Inc. | BAe.125 Series 800A (U-125) | Airworthiness Directives; BRITISH AEROSPACE Model BH.125-600A, HS.125-700A, and BAe 125-800A Series Airplanes |
| aircraft | Textron Aviation Inc. | BH.125 Series 600A | Airworthiness Directives; BRITISH AEROSPACE Model BH.125-600A, HS.125-700A, and BAe 125-800A Series Airplanes |
| aircraft | Textron Aviation Inc. | HS.125 Series 700A | Airworthiness Directives; BRITISH AEROSPACE Model BH.125-600A, HS.125-700A, and BAe 125-800A Series Airplanes |
Unsafe Condition
Loss of aileron control due to water system pressure pump activation interfering with aileron control system components.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Drain all water from the aft lavatory water system reservoir, deactivate the water system pressure pump by pulling the circuit breaker beneath the vanity, install a tie wrap on the circuit breaker to prevent reset, and obtain approval for reactivation or alternate compliance from the Manager, Special Programs Office, ASW-190, FAA, Southwest Region.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Required prior to further flight, unless previously accomplished.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
BRITISH AEROSPACE Model BH.125-600A, HS.125-700A, and BAe 125-800A series airplanes equipped with cabin interior and aft lavatory water system installed per STC SA2271SW.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Lavatory Water System
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_90-08-07.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 90-08-07 Document Type: AD Final Rules Docket Number: 90-NM-60-AD Subject Heading: Airworthiness Directives; BRITISH AEROSPACE Model BH.125-600A, HS.125-700A, and BAe 125-800A Series Airplanes Subject: Lavatory Water System Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 05/29/1990 Make: Textron Aviation Inc. Model: BAe.125 Series 800A | BAe.125 Series 800A (C-29A) | BAe.125 Series 800A (U-125) | BH.125 Series 600A...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: 90-08-07 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: 90-NM-60-AD AMENDMENT: 39-6600 AD NUMBER: 90-08-07 SUBJECT HEADING: Airworthiness Directives; BRITISH AEROSPACE Model BH.125-600A, HS.125-700A, and BAe 125-800A Series Airplanes ACTION: SUMMARY: DATES: Effective May 29, 1990. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 90-08-07 BRITISH AEROSPACE: Amendment 39-6600. Docket No. 90-NM-60-AD. Final copy of Priority Letter AD. Applicability: Model BH.125-600A, HS.125-700A, and BAe 125-800A series airplanes, equipped with a cabin interior and aft lavatory water system installed in accordance with STC SA2271SW, certificated in any category. Compliance: Required prior to further flight, unless previously accomplished. To prevent loss of aileron control, accomplish the following: A. Drain all water from the aft lavatory water system reservoir, deactivate the water system pressure pump by pulling the circuit breaker located beneath the vanity in the aft lavatory, and install a tie wrap on the circuit breaker to prevent it from being reset. B. 1. The aft lavatory water system pressure pump may be reactivated upon accomplishment of a modification which has been approved by the Manager, Special Programs Office, ASW-190, FAA, Southwest Region. 2. An alternate means of compliance or adjustment of the compliance time, which provides an acceptable level of safety, may be used when approved by the Manager, Special Programs Office, ASW-190, FAA, Southwest Region. NOTE: The request should be forwarded through an FAA Principal Maintenance Inspector (PMI), who will either concur or comment and then send it to the Manager, Special Programs Office, ASW-190. C. Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes to a base in order to comply with the requirements of this AD. This amendment (39-6600, AD 90-08-07) becomes effective on May 29, 1990, as to all persons, except those persons to whom it was made immediately effective by priority letter AD 90-08-07, issued April 10, 1990, which contained this amendment. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_90-08-07.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 90-08-07 Document Type: AD Final Rules Docket Number: 90-NM-60-AD Subject Heading: Airworthiness Directives; BRITISH AEROSPACE Model BH.125-600A, HS.125-700A, and BAe 125-800A Series Airplanes Subject: Lavatory Water System Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 05/29/1990 Make: Textron Aviation Inc. Model: BAe.125 Series 800A | BAe.125 Series 800A (C-29A) | BAe.125 Series 800A (U-125) | BH.125 Series 600A...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: 90-08-07 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: 90-NM-60-AD AMENDMENT: 39-6600 AD NUMBER: 90-08-07 SUBJECT HEADING: Airworthiness Directives; BRITISH AEROSPACE Model BH.125-600A, HS.125-700A, and BAe 125-800A Series Airplanes ACTION: SUMMARY: DATES: Effective May 29, 1990. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 90-08-07 BRITISH AEROSPACE: Amendment 39-6600. Docket No. 90-NM-60-AD. Final copy of Priority Letter AD. Applicability: Model BH.125-600A, HS.125-700A, and BAe 125-800A series airplanes, equipped with a cabin interior and aft lavatory water system installed in accordance with STC SA2271SW, certificated in any category. Compliance: Required prior to further flight, unless previously accomplished. To prevent loss of aileron control, accomplish the following: A. Drain all water from the aft lavatory water system reservoir, deactivate the water system pressure pump by pulling the circuit breaker located beneath the vanity in the aft lavatory, and install a tie wrap on the circuit breaker to prevent it from being reset. B. 1. The aft lavatory water system pressure pump may be reactivated upon accomplishment of a modification which has been approved by the Manager, Special Programs Office, ASW-190, FAA, Southwest Region. 2. An alternate means of compliance or adjustment of the compliance time, which provides an acceptable level of safety, may be used when approved by the Manager, Special Programs Office, ASW-190, FAA, Southwest Region. NOTE: The request should be forwarded through an FAA Principal Maintenance Inspector (PMI), who will either concur or comment and then send it to the Manager, Special Programs Office, ASW-190. C. Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes to a base in order to comply with the requirements of this AD. This amendment (39-6600, AD 90-08-07) becomes effective on May 29, 1990, as to all persons, except those persons to whom it was made immediately effective by priority letter AD 90-08-07, issued April 10, 1990, which contained this amendment. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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