AD 91-25-01

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AD Number:
91-25-01
Document Type:
AD Final Rules
Docket Number:
91-NM-219-AD
Subject Heading:
Airworthiness Directives; ISRAEL AIRCRAFT INDUSTRIES (IAI), LTD. Model 1125 Series Airplanes
Subject:
Horizontal Stabilizer Trim
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
12/10/1991
Make:
Gulfstream Aerospace LP
Model:
1125 Westwind Astra
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Superseded AD: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Superseded By: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: 91-25-01
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   91-NM-219-AD

AMENDMENT:   39-8102

AD NUMBER:   91-25-01

SUBJECT HEADING:   Airworthiness Directives; ISRAEL AIRCRAFT INDUSTRIES (IAI), LTD. Model 1125 Series Airplanes

ACTION:  

SUMMARY:  

DATES:   Effective December 10, 1991.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
91-25-01 ISRAEL AIRCRAFT INDUSTRIES (IAI), LTD.: Amendment 39-8102. Docket No. 91- NM-219-AD.
Applicability: All Model 1125 series airplanes, certificated in any category.

Compliance: Required as indicated, unless previously accomplished.

To prevent uncontrolled pitch trim movement, accomplish the following:

(a) Within 3 days after the effective date of this AD, revise the Limitations Section of the FAA-approved Airplane Flight Manual (AFM) to include the following. This may be done by inserting a copy of this AD in the AFM.

"BEFORE TAXIING
Horizontal stabilizer trim - CHECK OVERRD & EMERG; EMERG ARM
pushbutton - DISENGAGE, CHECK NORMAL (buzzer)

NOTE

When checking override system, observe trim indicator; electrical limit switches are inoperative.


CAUTION


Do not use emergency trim in place of normal or override trim systems. Use of emergency trim is limited to elevator control failure (Section II, page II-28) and horizontal stabilizer trim failure (Section III, page III-9)."

NOTE: Inserting Astra (Model 1125) AFM Temporary Revision No. 3, dated June 9, 1991, in the Limitations section of the AFM, or inserting an AFM revision containing this information, is considered an acceptable alternative method of compliance with this paragraph.

(b) Within 3 days after the effective date of this AD, revise the Normal Procedures Section of the FAA-approved AFM to include the following. This may be done by inserting a copy of this AD in the AFM.

"BEFORE TAXIING
Horizontal stabilizer trim - CHECK OVERRD & EMERG; EMERG ARM
pushbutton - DISENGAGE, CHECK NORMAL (buzzer)

NOTE

When checking override system, observe trim indicator; electrical limit switches are inoperative.

CAUTION

Do not use emergency trim in place of normal or override trim systems. Use of emergency trim is limited to elevator control failure (Section II, page II-28) and horizontal stabilizer trim failure (Section III, page III-9)."

NOTE: Inserting Astra (Model 1125) AFM Temporary Revision No. 3, dated June 9, 1991, in the Procedures Section of the AFM, or inserting an AFM revision containing this information, is considered an acceptable alternative method of compliance with this paragraph.

(c) An alternative method of compliance or adjustment of the compliance time, which provides an acceptable level of safety, may be used when approved by the Manager, Standardization Branch, ANM- 113, FAA, Transport Airplane Directorate.

NOTE: The request should be forwarded through an FAA Principal Operations Inspector, who may concur or comment and then send it to the Manager, Standardization Branch, ANM-113.

(d) 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.

(e) This amendment (39-8102, AD 91-25-01) becomes effective on December 10, 1991.

FOOTER: