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EASA AIRWORTHINESS DIRECTIVE 

AD No: 2007-0122 

[Corrected: 07 May 2007] 

Date: 03 May 2007

No person may operate an aircraft to which an Airworthiness Directive applies, except in accordance with the 

requirements of that Airworthiness Directive unless otherwise agreed with the Authority of the State of Registry.

Type Approval Holder’s Name: 

Fokker Services B.V. 

(formerly Fokker Aircraft B.V.) 

Type/Model designation(s): 

F28 Mark 0070 and Mark 0100 

TCDS Number: EASA A.037 

Foreign AD: Not applicable 

Supersedure: Not applicable 

ATA 28 Fuel System - Crossfeed Valve Actuators and Fuel Fire Shut 

off Valve Actuators - Temporary Maintenance Tasks 

Manufacturer(s): Fokker Aircraft B.V. 

Applicability: 

F28 Mark 0070 and Mark 0100 aircraft, serial numbers 11244 through 

11585 inclusive, if equipped with fuel crossfeed valve- and fuel fire shut 

off valve actuators, Part Number (P/N) 9409122. 

Reason: 

In-service experience revealed that, due to their position on the aircraft, 

ice may form on actuators P/N 9409122 installed on fuel crossfeed 

valves and fuel fire shut-off valves. Tests revealed that the ice can 

prevent the actuator and thus the valve from operating in flight (frozen 

stuck). A new actuator is being developed by Fokker Services. However, 

an airworthiness assessment revealed that interim actions are required 

for actuators p/n 9409122 installed on fuel crossfeed valves and fuel fire 

shut-off valves until the new actuators are installed. Fokker Services 

have issued Service Bulletin (SB) SBF100-28-049 to introduce interim 

actions that will reduce the probability that fuel crossfeed and fuel fire 

shut-off valves equipped with actuators p/n 9409122 do not operate due 

to ice. The interim actions consist of an operational check of the 

actuators and the application of a grease layer on the actuators, followed 

by a weekly visual check of the applied grease layer and a 4-weekly 

operational check of the actuators. 

For the reasons stated above, this Airworthiness Directive (AD) requires 

compliance with instructions contained in the referenced SB. 

This AD has been re-published to correct typographical errors in the 

‘Remarks’ section, where the word ‘Proposed’ should have been deleted.

Effective Date: 18 May 2007 
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Compliance: 

Required as indicated, unless accomplished previously: 

(1) Within 30 days after the effective date of this AD, perform an 

operational check of, and application of grease on, the LH and RH 

fuel crossfeed valve actuators and fuel fire shut off valve actuators 

as defined in Part 1 of SBF-100-28-049. 

(2) After compliance with paragraph 1 of this directive: 

(a) At intervals not to exceed 7 days, perform a visual inspection of 

the applied grease layer on the LH and RH fuel crossfeed valve 

actuators and fuel fire shut off valve actuators as defined in Part 2 of 

SBF-100-28-049. This interval may be reduced if required by 

operational circumstances; and 

(b) At intervals not to exceed 28 days, perform an operational check 

and visual inspection of the LH and RH fuel crossfeed valve 

actuators and fuel fire shut off valve actuators as defined in Part 3 of 

SBF-100-28-049. 

(3) When, during any of the inspections as required by paragraph (2)(a) 

of this directive, the layer of grease on any valve actuator is found to 

be insufficient (less than approx. 2 – 3 mm), before next flight, repeat 

the application of grease as defined in Part 1 of SBF-100-28-049; 

(4) When a fuel fire shut-off valve actuator fails the operational check as 

required by paragraphs (1) or (2)(b) of this directive, before next 

flight, replace the valve actuator with a serviceable part in 

accordance with the Aircraft Maintenance Manual. 

(5) When a fuel crossfeed valve actuator fails the operational check as 

required by paragraphs (1) or (2)(b) of this directive, before next 

flight, replace the valve actuator with a serviceable part in 

accordance with the Aircraft Maintenance Manual or operate the 

aircraft in accordance with (the conditions and remarks in) MMEL 

item 28-23-1. 

Ref. Publications: Fokker Services SBF-100-28-049 dated 03 April 2007, or later approved 

revisions of this document. 

Remarks:

1. If requested and appropriately substantiated the responsible EASA 

manager for the related product has the authority to accept 

Alternative Methods of Compliance (AMOC’s) for this AD. 

2. This AD was posted on 18 April 2007 as PAD 07-064 for 

consultation until 02 May 2007.No comments were received during 

the consultation period. 

3. Enquiries regarding this Airworthiness Directive should be referred 

to the AD Focal Point - Certification Directorate, EASA. 

E-mail ADs@easa.europa.eu

4. For any questions concerning the technical aspects of the 

requirements in this AD, please contact: Fokker Services B.V., 

Technical Services Dept., P.O.Box 231, 2150 AE Nieuw-Vennep, 

The Netherlands; telephone (31) 252-627-350; facsimile (31) 252-

627-211; e-mail: technicalservices.fokkerservices@stork.com

The referenced publication can be downloaded from 

www.myfokkerfleet.com