81-24-02: Hydraulic System Fluid Flow
FAA order 81-24-02 is an airworthiness directive in force since November 23, 1981. The FAA's subject line: Hydraulic System Fluid Flow. It names Gulfstream American Corp G-1159: about 29 aircraft on the U.S. register today, though an order usually covers particular versions or serial numbers rather than every one. System: heating, ice protection and utility systems.
What it applies to as the FAA lists it
- Kind of product
- Aircraft
- Makes
- Gulfstream Aerospace Corporation
- Models
- G-1159, G-1159A
- On this site
- Gulfstream American Corp G-1159 29 registered
Dates and paperwork
- In force since
- November 23, 1981
- Docket
- Unknown
- Status
- Current
- The FAA's document
- Read the order on the FAA's site
The order itself the regulatory text, as published
Show the full text (947 characters)
81-24-02 GULFSTREAM AMERICAN CORPORATION (GRUMMAN AMERICAN AVIATION CORPORATION): Amendment 39-4259. Applies to Model G-1159 Serial Numbers 1 through 248, 250, 251, 253 through 258 and 775; Model G-1159A Serial Numbers 249, 252, 300 through 338 and 875.
Compliance required within the next 75 hours time in service after the effective date of this AD, unless already accomplished. To prevent the loss of fluid flow in the auxiliary hydraulic system following a complete loss of fluid in the combined hydraulic system, install a check valve in the reservoir system in accordance with Gulfstream American Aircraft Service Change (ASC) No. 295 (for the Model G-1159) and ASC No. 21 (for the Model G-1159A), both dated September 1, 1981. An equivalent method of compliance may be approved by the Chief, Engineering and Manufacturing Branch, Federal Aviation Administration, Southern Region.
This amendment becomes effective November 23, 1981.
Related safety bulletins advice on the same designs, not orders
2019-12-05CE-19-20 · Flight Compartment Windows
2008-10-10NM-07-39R1 · Powerplant System: Forward bearing fitting attach bolts
2007-06-28NM-07-39 · Forward bearing fitting attach bolts
Source: FAA Dynamic Regulatory System, airworthiness directives. The FAA's document is the authority; the register counts are this site's, from the FAA register of November 6, 2026. Connections as data: /graph/directive/81-24-02.json · aircraft systems.