AD 88-20-04

88-20-04 GULFSTREAM AEROSPACE CORPORATION: Amendment 39-6030. Applies to Model G-IV airplanes, serial numbers 1000 through 1059, certificated in any category.

Compliance required as indicated, unless previously accomplished.

To prevent loss of engine power while flying in icing conditions, accomplish the following:

A. Within 48 hours after the effective date of this AD, insert the following into the Limitations Section of the FAA-approved Airplane Flight Manual (AFM) and alert flight crews. This may be accomplished by inserting a copy of this AD in the AFM:

"Flight into known or forecast icing conditions not approved."

B. Within 48 hours after the effective date of this AD, install placards in front of each pilot's station and in clear view, stating:

"FLIGHT INTO KNOWN OR FORECAST ICING CONDITIONS NOT APPROVED"

NOTE: The placards may be fabricated of suitable material, with 1/8" minimum height lettering.

C. Prior to flight into known or forecast icing conditions, modify the crew alerting system and the anti-ice system, in accordance with Gulfstream Aircraft Service Change ASC-51A, dated May 12, 1988. When this is accomplished, the AFM limitation and placards required by paragraph A., above, may be removed.

D. 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, Atlanta Aircraft Certification Office, FAA, Central Region.

NOTE: The request for alternate means of compliance should be forwarded through an FAA Principal Operations Inspector (POI) or Principal Maintenance Inspector (PMI), as appropriate, who may add any comments and then send it to the Manager, Atlanta Aircraft Certification Office.

E. 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.

All persons affected by this directive who have not already received the appropriate service information from the manufacturer may obtain copies upon request to Gulfstream Aerospace Corporation, P.O. Box 2206, Savannah, Georgia 31402-2206. This information may be examined at FAA, Northwest Mountain Region, 17900 Pacific Highway South, Seattle, Washington, or FAA, Central Region, Atlanta Aircraft Certification Office, 1669 Phoenix Parkway, Suite 210C, Atlanta, Georgia.

This Amendment, 39-6030, becomes effective October 13, 1988.