Subject 

Reason 

Reason for 

Revision 

Effectivity 

Compliance 

Publications 

affected 

Change Note 

I JAN 09/14 

Manual Change Notification - Maintenance Documentation 

Fokker 28 

MCNM-F28-037 REV 1 

Fuel - Introduction of a Layer of Sealant onto the Parts which attach the FQIS 

Probe to the Mounting-Flange of the Fuel Quantity Tank Unit. 

This MCN is issued to provide you with the changes on the content(s) of the 

affected manual(s), due to the introduction of SBF28-28-054. 

In Revision 1 of SBF28-28-054, the accomplishment instructions have been 

changed, to exclude the one time inspection on the clearance between the 

FQIS probes and the adjacent structure. This MCNM has been revised 

accordingly. 

Refer to SBF28-28-054. 

Once you have determined the applicability of this MCN for one or more of your 

aircraft, incorporate this information into the applicable manual(s). 

The F28 Maintenance Manual (MM). 

If your manual contains Temporary Revision No. 28-34, then update this TR as 

follows: 

Change the title of Fig. 602 "Tankprobe Attachment" to " Fuel Quantity 

Tank Unit Attachment" 

In paragraph 1.A., replace the text "tankprobe(s)" by "Fuel Quantity Tank 

Units" or "(FQTU)" 

In paragraph 1.8., change the title to "INSPECTION OF THE TANK 

PROBE OF THE FQTU" 

In paragraph 1.C., change step (1 ), as follows: 

FQTU attachment inspection (See Fig. 602) 

(a) Use your hands, to make sure that the attachment of the FQTU probe 

installation is tight. If necessary, correct the FQTU installation (Refer to 28-

41-01 pageblock 401 for corrective action). 

MCNM F28-037 REV 1 

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Manual Change Notification - Maintenance Documentation 

Fokker 28 

(b) Make sure that the three self-locking nuts (3) including the washers below 

these nuts and the stud-ends, are fully covered with sealant. 

(c) Make sure that the layer of sealant is not damaged. If damaged, then 

correct the installation of the FQTU as necessary (Refer to 28-41-01 

pageblock 401 for corrective action) 

In paragraph 6.B., delete step 1(a) ~ 

In paragraph 6.B., add the following step (2) before the existing step (2}, 

then re-identify the existing steps accordingly: 

(2) FQTU attachment inspection (See Fig. 602) 

(a) Use your hands, to make sure that the attachment of the FQTU probe 

installation is tight. If necessary, correct the FQTU installation (Refer to 28-

41-01 pageblock 401 for corrective action). 

(b) Make sure that the three self-locking nuts (3) including the washers below 

these nuts and the stud-ends, are fully covered with sealant. 

(c) Make sure that the layer of sealant is not damaged. If damaged, then 

correct the installation of the FQTU as necessary (Refer to 28-41-01 

pageblock 401 for corrective action). 

Update Temporary Revision No. 28-54 or AMM 28-41-01 Pageblock 401 (as 

applicable), as follows: 

Replace the illustration of Figure 401 by the illustration shown at the end of 

this MCNM 

Replace paragraph 2.C., by this text: 

C. Prepare for Installation (see figure 401) 

CAUTION: CARE SHOULD BE TAKEN NOT TO SCRATCH, BEND OR SCORE THE 

OUTER TUBE ASSEMBLY AS SUCH DAMAGE MAY NECESSITATE 

PROBE REPLACEMENT. 

NOTE: Start of Fuel System CDCCL affected section. 

( 1) Ensure that the probe is "clean and free of any deposits and that the mounting holes 

are unobstructed". 

(2) Make sure the probe is not corroded, bent or broken. 

(3) Make sure that the installation of the probe to the mounting-flange (1) is tight. If 

necessary, re-tighten the three self-locking nuts (3). 

(4) Apply a layer of sealant (PR 1422B (ref. PPG Industries)) onto the installation of the 

three self-locking nuts (3). 

(5) Make sure that the self-locking nuts (3) including the washers below these nuts and 

the stud-ends are fully covered with a layer of the sealant (PR 1422B). 

NOTE: 

I JAN 09/14 

End of Fuel System CDCCL affected section. 

MCNM F28-037 REV 1 

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Manual Change Notification - Maintenance Documentation 

Fokker 28 

NOTE: If you have a Continued Airworthiness Documentation Service with Fokker Services, this 

MCN will be included into your manual, at the earliest opportunity. 

NOTE: MCNM-F28-037 Revision 1 supersedes MCNM-F28-037 dated JUN 30/10. 

Text highlighted by a revision bar indicates: 

A revision of the text introduced with the original issue of this MCNM. 

An introduction of new changes. 

Text not highlighted by a revision bar was already included in the original issue of this 

MCNM, and is not revised. It is retained for clarity. 

I JAN 09/14 MCNM F28-037 REV 1 

Page 3 of4 
I JAN 09/14 

Manual Change Notification - Maintenance Documentation 

Fokker 28 

1. MOUNTING f!.ANGF 

--••• ___ ? (01-lP[NSA lOR 

o VIEW A 

n Y?iC~>~: 

Figure 401 Tankprobe 

HRMINAL 

~) 

MCNM F28-037 REV 1 

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