# AD 77-08-03: Static System - Type: Airworthiness directive - Status: Current - Products: True Flight Holdings AA-5A and AA-5B - Effective: April 19, 1977 - Superseded by: Nothing supersedes this AD - Product type: Aircraft, Small airplane - Amendment: 39-2873 - Registered aircraft: 1,344 may be affected, by airframe or engine model (OpenAirDocs) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/BF2D5F570409F3FA86256A38005E7B29.0001 - DRS record last changed: May 30, 2024 - Page: https://openairdocs.org/ad/77-08-03 ## The airworthiness directive 77-08-03 GRUMMAN AMERICAN AVIATION CORPORATION: Amendment 39- 2873. Applies to Model AA-5A, serials AA5A-0001 through AA5A-0340 and Model AA-5B, serials AA5B-0001 through AA5B-0451 airplanes equipped with an alternate static source system. Compliance required prior to further flight under Instrument Flight Rules (IFR) or night flight, or within the next 25 hours day Visual Flight Rules (VFR) time in service after the effective date of this AD or the next scheduled inspection, whichever comes first, unless already accomplished. To prevent faulty altitude, airspeed, and vertical speed indications from being presented to the pilot, accomplish the following: Disassemble, clean, lubricate, and reassemble the alternate static source valve, Gerdes part number A-1390, and leak test the static system in accordance with the following procedure: 1. Remove static source valve knob and jamb nut. 2. Note static line routing and remove lines from valve body. 3. Remove attach screws and valve assembly from aircraft. 4. Disassemble valve by removing hex bushing from forward end of valve and pushing valve shaft thru valve body. 5. Wipe and save all grease from valve shaft with a clean lint-free cloth. 6. Clean inside valve body with a lint-free cloth. 7. Blow compressed air thru fittings into valve body to clear ports. 8. Reclean inside of valve body. 9. Lubricate O-rings only with a very thin film of grease removed in Step 5. Keep rest of shaft dry. 10. Reassemble valve, mark serial number plate with a red dot, reinstall in instrument panel and reconnect lines to their respective ports. 11. Conduct a static system leak test according to the procedure in Grumman American Service Bulletin No. 160, dated March 21, 1977, or FAA Advisory Circular AC 43- 203A (Ref. FAR 23.1325). Any equivalent method of compliance with this AD must be approved by the Chief, Engineering and Manufacturing Branch, FAA, Southern Region. This amendment becomes effective April 19, 1977. ## Affected data sheets (1) (OpenAirDocs) The type certificate data sheets whose models the AD names. - [TCDS A16EA](https://openairdocs.org/tcds/A16EA): True Flight Holdings LLC; names 2 of 4 models: AA-5B, AA-5A ## 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: 1,344 (1,344 by airframe model, 0 by engine model) - Makers: Grumman American Avn. 1,029, Gulfstream American 315 Models with the most aircraft: - [Grumman American Avn. AA-5B](https://openairdocs.org/model/grumman-american-avn-aa-5b): 643 aircraft (airframe model) - [Grumman American Avn. AA-5A](https://openairdocs.org/model/grumman-american-avn-aa-5a): 386 aircraft (airframe model) - [Gulfstream American AA-5B](https://openairdocs.org/model/gulfstream-american-aa-5b): 216 aircraft (airframe model) - [Gulfstream American AA-5A](https://openairdocs.org/model/gulfstream-american-aa-5a): 99 aircraft (airframe model) All 4 models: https://openairdocs.org/ad/77-08-03/models.md Every aircraft: https://openairdocs.org/ad/77-08-03/aircraft.md ## Related documents - [AC 43-10C](https://openairdocs.org/ac/43-10): United States—Canadian Bilateral Aviation Safety Agreement Maintenance Implementation Procedures. Cited as AC 43 in the AD's requirements - [AC 43-11 CHG 1 Ed Update](https://openairdocs.org/ac/43-11): Reciprocating Engine Overhaul Terminology and Standards. Cited as AC 43 in the AD's requirements - [AC 43-12A CHG 1](https://openairdocs.org/ac/43-12): Preventive Maintenance. Cited as AC 43 in the AD's requirements - [AC 43-14](https://openairdocs.org/ac/43-14): Maintenance of Weather Radar Radomes. Cited as AC 43 in the AD's requirements - [AC 43-15](https://openairdocs.org/ac/43-15): Recommended Guidelines for Instrument Shops. Cited as AC 43 in the AD's requirements - [AC 43-16A](https://openairdocs.org/ac/43-16): Aviation Maintenance Alert: Improve Reliability-Interchange Service Experience. Cited as AC 43 in the AD's requirements - [AC 43-17](https://openairdocs.org/ac/43-17): Methods, Techniques, and Practices Acceptable to the Administrator Governing the Installation, Removal, or Change of Identification Data and Identification Plates. Cited as AC 43 in the AD's requirements - [AC 43-18 CHG 2](https://openairdocs.org/ac/43-18): Fabrication of Aircraft Parts by Maintenance Personnel. Cited as AC 43 in the AD's requirements - [AC 43-2B](https://openairdocs.org/ac/43-2): Minimum Barometry for Calibration and Test of Atmospheric Pressure Instruments. Cited as AC 43 in the AD's requirements - [AC 43-203B](https://openairdocs.org/ac/43-203): Altimeter and Static System Tests and Inspections. Cited as AC 43 in the AD's requirements - [AC 43-204](https://openairdocs.org/ac/43-204): Visual Inspection for Aircraft. Cited as AC 43 in the AD's requirements - [AC 43-205](https://openairdocs.org/ac/43-205): Guidance for Selecting Chemical Agents and Processes for Depainting and General Cleaning of Aircraft and Aviation Products. Cited as AC 43 in the AD's requirements - [AC 43-206 CHG 1](https://openairdocs.org/ac/43-206): Inspection, Prevention, Control, and Repair of Corrosion on Avionics Equipment. Cited as AC 43 in the AD's requirements - [AC 43-207](https://openairdocs.org/ac/43-207): Correlation, Operation, Design, and Modification of Turbofan/Jet Engine Test Cells. Cited as AC 43 in the AD's requirements - [AC 43-208 CHG 1](https://openairdocs.org/ac/43-208): Maintenance of Emergency Evacuation Systems for Aircraft Operating Under Part 121. Cited as AC 43 in the AD's requirements - [AC 43-209A](https://openairdocs.org/ac/43-209): Recommended Inspection Procedures for Former Military Aircraft. Cited as AC 43 in the AD's requirements - [AC 43-210A CHG 2](https://openairdocs.org/ac/43-210): Standardized Procedures for Obtaining Approval of Data Used in the Performance of Major Repairs and Major Alterations. Cited as AC 43 in the AD's requirements - [AC 43-211A Ed Update](https://openairdocs.org/ac/43-211): Recommended Alternative Inspection Schedule for Daher (Socata) TBM Series Aircraft. Cited as AC 43 in the AD's requirements - [AC 43-213A CHG 1](https://openairdocs.org/ac/43-213): Parts Marking Identification. Cited as AC 43 in the AD's requirements - [AC 43-214A Ed Update](https://openairdocs.org/ac/43-214): Repairs and Alterations to Composite and Bonded Aircraft Structure. Cited as AC 43 in the AD's requirements - [AC 43-215 Ed Update 3](https://openairdocs.org/ac/43-215): Standardized Procedures for Performing Aircraft Magnetic Compass Calibration. Cited as AC 43 in the AD's requirements - [AC 43-216A](https://openairdocs.org/ac/43-216): Software Management During Aircraft Maintenance. Cited as AC 43 in the AD's requirements - [AC 43-217 Ed Update](https://openairdocs.org/ac/43-217): Anticollision Light Maintenance Program. Cited as AC 43 in the AD's requirements - [AC 43-218 Ed Update](https://openairdocs.org/ac/43-218): Operational Authorization of Integrated Aircraft Health Management Systems. Cited as AC 43 in the AD's requirements - [AC 43-4B Ed Update 2](https://openairdocs.org/ac/43-4): Corrosion Control for Aircraft. Cited as AC 43 in the AD's requirements - [AC 43-6D Ed Update](https://openairdocs.org/ac/43-6): Altitude Reporting Equipment and Transponder System Maintenance and Inspection Practices. Cited as AC 43 in the AD's requirements - [AC 43-7](https://openairdocs.org/ac/43-7): Ultrasonic Testing for Aircraft. Cited as AC 43 in the AD's requirements - [AC 43-9D Ed Update](https://openairdocs.org/ac/43-9): Maintenance Records and FAA Form 8130-3 Return to Service. Cited as AC 43 in the AD's requirements --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.