90-23-13 FOKKER: Amendment 39-6803. Docket No. 90-NM-219-AD.
Applicability: Model F-28 Mark 0100 series airplanes, Serial Numbers 11244 through 11286, 11289, 11291 through 11293, 11295, 11297, 11300, 11303, 11306, 11308, 11310, 11312, and 11314, certificated in any category.
Compliance: Required as indicated, unless previously accomplished.
To prevent loss of flight path control during automatic flight, accomplish the following:
A. Within 5 days after the effective date of this AD, incorporate the following changes into the Limitation Section of the FAA approved Airplane Flight Manual. This may be accomplished by inserting a copy of this AD in the AFM.
1. Section 2.01.01 - Delete the following statements if incorporated in the "Kinds of Operation" paragraph in this section.
- CAT II approach. Compliance with FAA AC 120-29 has been demonstrated.
- CAT IIIA approach. Compliance with FAA AC 120-28C has been demonstrated.
- Autoland. Compliance with FAA AC 20-57A has been demonstrated.
2. Section 2.08.01 -
a. Delete the following paragraphs:
- Autopilot.
- CAT II Approach (AP Coupled Only).
- ILS Approach.
b. If a "GA MODE" paragraph is incorporated, delete the following text: "During approach, after land 2/3 is annunciated until 500 feet above ground level (AGL), certain autopilot (AP) monitors are not available. It is the pilot's responsibility to monitor the AP performance during this phase. In case of a go-around (GA) during this phase, the AP shall be disconnected before triggering the TOGA lever."
c. If an "Aircraft Equipment" paragraph is incorporated, this paragraph must be deleted.
d. The following limitations must be added to Section 2.08.01: "AUTOPILOT - The autopilot must not be used in the take-off mode. The autopilot must not be used below 1,500 feet AGL."
B. Within 5 days after the effective date of this AD fabricate a placard which states:"The autopilot must not be used in the take-off mode. The autopilot must not be used below 1,500 feet AGL."
Install this placard in full view of the pilot in the cockpit.
C. Within 14 days after the effective date of this AD, perform an inspection of the autopilot primary servomotors in accordance with Fokker Service Bulletin F100-22-021, dated August 22, 1990. If the jumper wires are missing, prior to further flight, replace the affected servomotor with a modified unit, in accordance with the Fokker service bulletin.
NOTE: The Fokker service bulletin references Collins Alert Service Bulletin SVO-1000-22-A05, Revision 1, dated August 22, 1990, for additional instructions.
D. Following the inspection required by paragraph C. of this AD, and modification, if necessary, the changes to the flight manual and the placard required by paragraphs A. and B. of this AD may be removed.
E. 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, Standardization Branch, ANM- 113, FAA, Transport Airplane Directorate.
NOTE: The request should be submitted directly to the Manager, Standardization Branch, ANM- 113, and a copy sent to the cognizant FAA Principal Inspector (PI). The PI will then forward comments or concurrence to the Manager, Standardization Branch, ANM-113.
F. 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 Fokker Aircraft USA, Inc., 1199 North Fairfax Street, Alexandria, Virginia 22314. This information may be examined at the FAA, Northwest Mountain Region, Transport Airplane Directorate, 1601 Lind Avenue S.W., Renton, Washington.
This amendment (39-6803, AD 90-23-13) becomes effective on November 26, 1990.