EASA AD No : 2011-0227

EASA Form 110 Page 1/3

EASA AIRWORTHINESS DIRECTIVE

AD No.: 2011-0227

Date: 06 December 2011

Note: This Airworthiness Directive (AD) is issued by EASA, acting in accordance with 

Regulation (EC) No 216/2008 on behalf of the European Community, its Member States and of 

the European third countries that participate in the activities of EASA under Article 66 of that 

Regulation.

This AD is issued in accordance with EC 1702/2003, Part 21A.3B. In accordance with EC 2042/2003 Annex I, Part M.A.301, the 

continuing airworthiness of an aircraft shall be ensured by accomplishing any applicable ADs. Consequently, no person may operate an 

aircraft to which an AD applies, except in accordance with the requirements of that AD, unless otherwise specified by the Agency [EC 

2042/2003 Annex I, Part M.A.303] or agreed with the Authority of the State of Registry [EC 216/2008, Article 14(4) exemption].

Type Approval Holder’s Name :

Fokker Services B.V.

Type/Model designation(s) :

F28 aeroplanes

TCDS Number : EASA.A.037

Foreign AD : Not applicable

Supersedure : None

ATA 28 Fuel – Wing and Integral Center Wing Tanks – Modification

[Fuel Tank Safety]

Manufacturer(s): Fokker Aircraft B.V.

Applicability: F28 Mark 0070 and F28 Mark 0100 aeroplanes, all serial numbers (s/n).

Reason: Prompted by an accident of a Boeing 747-131 (flight TWA800), the FAA

published Special Federal Aviation Regulation (SFAR) 88, and the Joint 

Aviation Authorities (JAA) published Interim Policy INT/POL/25/12. The design 

review conducted by Fokker Services on the Fokker 70 and Fokker 100 in 

response to these regulations revealed that the absence of electrical insulation 

material between a wing or Integral Center Wing Tank (ICWT) Fuel Quantity 

Indication System (FQIS) probe and the bottom of the tank structure could, 

under certain conditions, result in an ignition source in the tank vapour space.

This condition, if not corrected, could result in a fuel tank explosion and 

consequent loss of the aeroplane.

For the reasons described above, this AD requires the application of sealant 

below the FQIS probes in the wing tanks and below the FQIS probes in the 

ICWT, as applicable to aeroplane configuration. After modification, this AD 

requires repetitive inspections to verify that the sealant remains undamaged 

and, if damage is detected, repair or reapplication of sealant.

Effective Date: 20 December 2011
EASA AD No : 2011-0227

EASA Form 110 Page 2/3

Required Action(s) 

and Compliance 

Time(s):

Required as indicated, unless accomplished previously.

(1) For F28 Mark 0070 and Mark 0100 aeroplanes, all s/n: At a scheduled 

opening of the fuel tanks, but not later than 84 months after the effective 

date of this AD, apply sealant below the probes in the wing tanks in 

accordance with the instructions of Part 1 of Fokker Services Service 

Bulletin (SB) SBF100-28-067.

(2) For F28 Mark 0070 and Mark 0100 aeroplanes s/n 11442 through 

11585 inclusive, if equipped with an ICWT: At a scheduled opening of 

the fuel tank, but not later than 84 months after the effective date of this 

AD, apply sealant below the probes in the ICWT in accordance with the 

instructions of Part 2 of Fokker Services SBF100-28-067.

Note: The sealant to be applied, as required by this AD, must be approved for 

the purpose. Refer to paragraph 2.B. of SBF100-28-067 or contact Fokker 

Services for details.

(3) Within 96 months after modification of an aeroplane as required by 

paragraphs (1) and (2) of this AD, as applicable to aeroplane 

configuration, and thereafter at intervals not to exceed 96 months, inspect 

the tank structure below each FQIS probe in the wing tanks and, if 

applicable, below each FQIS probe in the ICWT, to determine that the

sealant coating is undamaged.

(4) If, during any inspection as required by paragraph (3) of this AD, damage 

is detected, before next flight, repair or reapply the coating, in accordance 

with the instructions for the Fuel ALI in paragraph 1.L.(1).(c) of Fokker 

Services SBF100-28-067. Repair or reapplication of sealant does not 

constitute terminating action for the repetitive inspections required by 

paragraph (3) of this AD.

(5) From the effective date of this AD, do not install a FQIS probe in the wing 

tanks and, if applicable, in the ICWT, or install a wing tank cover and, if 

applicable, an ICWT tank cover, unless the coating of sealant is in 

compliance with the requirements of this AD.

(6) Compliance with the requirements of paragraphs (3), (4) and (5) of this 

AD can be demonstrated by:

(6.1) Revising as follows the approved aircraft maintenance programme 

on the basis of which the Operator or the Owner ensures the 

continuing airworthiness of each operated aeroplane:

Incorporate the Fuel ALI’s and CDCCL’s in accordance with the 

information in paragraph 1.L.(1)(c) of Fokker Services

SBF100-28-067,

and

(6.2) Complying with the approved aircraft maintenance programme 

described in paragraph (6.1) of this AD.

Ref. Publications: Fokker Services SBF100-28-067 dated 02 September 2011.

The use of later approved revisions of this document is acceptable for 

compliance with the requirements of this AD.

Remarks: 1. If requested and appropriately substantiated, EASA can approve 

Alternative Methods of Compliance for this AD.

2. This AD was posted on 03 November 2011 as PAD 11-114 for 

consultation until 01 December 2011. The Comment Response Document

can be found at http://ad.easa.europa.eu/.

3. Enquiries regarding this AD should be referred to the Safety Information

Section, Executive Directorate, EASA. E-mail ADs@easa.europa.eu.

4. For any question concerning the technical aspects of the requirements in 
EASA AD No : 2011-0227

EASA Form 110 Page 3/3

this AD, please contact Fokker Services B.V., Technical Services Dept., 

P.O. Box 1357, 2130 EL Hoofddorp, The Netherlands;

telephone +31 88-628-00 00; facsimile +31 88-628-01 11;

e-mail: technicalservices@fokker.com.

The referenced publication can be downloaded from 

www.myfokkerfleet.com.