Airworthiness Directive · Amendment 39-18642 · Landing gear
Gulfstream Aerospace Corporation Airplanes
This AD applies to the Gulfstream Aerospace Corporation airplanes, certificated in any category, identified in paragraphs (c)(1) through (c)(7) of this AD.
(1) All Model G-1159 airplanes.
(2) All Model G-1159A airplanes.
(3) All Model G-1159B airplanes.
(4) All Model G-IV airplanes.
(5) All Model GV airplanes.
(6) Model GIV-X airplanes, serial numbers 4001 through 4350 inclusive.
(7) Model GV-SP airplanes, serial numbers 5001 through 5542 inclusive.
We are adopting a new airworthiness directive (AD) for all Gulfstream Aerospace Corporation Model G-1159, G-1159A, G-1159B, G-IV, and GV airplanes; and certain Model GIV-X and GV-SP airplanes. This AD requires a one-time replacement of the actuator end cap fitting of the main landing gear (MLG) door, and revision of the maintenance or inspection program to establish the life limit of the end cap fitting. This AD was prompted by a report of the failure of the right MLG to extend due to fatigue cracking of the end cap fitting. We are issuing this AD to prevent such cracking, which could result in depletion of the combined (left) and utility hydraulic system fluid and the nitrogen emergency blowdown system, failure of the combined (left) hydraulic system (all phases) to provide adequate hydraulic pressure, and failure of the MLG to extend when commanded.
Before the accumulation of 9,500 total landings on the MLG actuator end cap fitting, or within 90 days after the effective date of this AD, whichever occurs later: Replace the end cap fitting, in accordance with the applicable temporary revision (TR) identified in paragraphs (g)(1) through (g)(11) of this AD. For airplanes on which the number of total accumulated landings since new cannot be determined, do the replacement within 90 days after the effective date of this AD.
(1) Gulfstream IIB Maintenance Manual TR 32-3, dated April 15, 2016.
(2) Gulfstream IV Maintenance Manual TR 32-2, dated April 29, 2016.
(3) Gulfstream G300 Maintenance Manual TR 32-2, dated April 29, 2016.
(4) Gulfstream G400 Maintenance Manual TR 32-2, dated April 29, 2016.
(5) Gulfstream G350 Maintenance Manual TR 32-1, dated April 22, 2016.
(6) Gulfstream G450 Maintenance Manual TR 32-1, dated April 22, 2016.
(7) Gulfstream G500 Maintenance Manual TR 32-1, dated May 20, 2016.
(8) Gulfstream G550 Maintenance Manual TR 32-1, dated May 20, 2016.
(9) Gulfstream V Maintenance Manual TR 32-2, dated May 20, 2016.
(10) Gulfstream II Maintenance Manual TR 32-1, dated April 15, 2016.
(11) Gulfstream III Maintenance Manual TR 32-1, dated April 15, 2016.
Within 90 days after the effective date of this AD, revise the maintenance or inspection program, as applicable, to incorporate the information for the part number 1159HM20178 MLG actuator end cap fitting in the applicable TR identified in paragraphs (h)(1) through (h)(11) of this AD. The initial compliance time to replace the MLG actuator end cap fitting, as specified in the TR, is before the accumulation of 9,500 total landings on the end cap fitting, or within 90 days after the effective date of this AD, whichever occurs later.
(1) Gulfstream IIB Maintenance Manual TR 5-3, dated April 15, 2016.
(2) Gulfstream IV Maintenance Manual TR 5-7, dated April 29, 2016.
(3) Gulfstream G300 Maintenance Manual TR 5-3, dated April 29, 2016.
(4) Gulfstream G400 Maintenance Manual TR 5-3, dated April 29, 2016.
(5) Gulfstream G350 Maintenance Manual TR 5-2, dated April 22, 2016.
(6) Gulfstream G450 Maintenance Manual TR 5-2, dated April 22, 2016.
(7) Gulfstream G500 Maintenance Manual TR 5-3, dated May 20, 2016.
(8) Gulfstream G550 Maintenance Manual TR 5-3, dated May 20, 2016.
(9) Gulfstream V Maintenance Manual TR 5-3, dated May 20, 2016.
(10) Gulfstream II Maintenance Manual TR 5-3, dated April 15, 2016.
(11) Gulfstream III Maintenance Manual TR 5-2, dated April 15, 2016.
After the maintenance or inspection program has been revised as required by paragraph (h) of this AD, no alternative actions (e.g., inspections) or intervals may be used unless the actions or intervals are approved as an alternative method of compliance (AMOC) in accordance with the procedures specified in paragraph (k) of this AD.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
