u.S Oepatment 

of fiOmporlotbn 

FOdOIOI Avl01ion 

Administration 

SEP 1 8 20!5 

Mr. Daniel Bums 

Chief Airworthiness J;ngineer 

Bombardier Aerospace 

P. 0. Box 6087 St:uion Cenore-ville 

Monoreal, Quebe.c. Canada B3C 309 

New Yo"' Aircraft Certf.:ccltron Office 

1600 Stew;t.l'l Aw:nuc 

Su e4 0 

We&tbury. HY 115$0 

(516) 223-7:300, Fa)(: (516) 794-..55l1 

Subject: f\·fethod of Compliance-fot Airwonhiness Direc.tive 2015-15-0S 

De~r Mr. Burns: 

This letter provides a Method ofComplirutcc (MOC) to AD 2015-15-08. This MOC is 

applicable to Bombardier Inc. Models 13U-I 00-1 A I 0 (Challenger 300), equipped v.ith a 

spoilerelccoronic control unit (SECU) having p!l~ numbcr(PIN) C47330-006, C47330-007. 

or C47330-008 certified in any category. 

AD 2015-15-08 was prompl(..-d by '"'-sting oft he Spoiler t:le<:tronic control unit (SECU) 

sofhvare for an upgrade, which revealed a timing error bet\vee.n the command and monitor 

channels. l l 1is AD was issued lO prevent a timirlg error in the SECU software, which. in 

combination with failure of the roll disconnect switch. could result in complete loss of 

spoiler functionality and con.sequent reduced c.onuollability of the airplane. 

l')amgraph (g) of AD 2015-15·08 requires revising the maintenance or inspection program to 

incorporate repetitive operation tests oft he. aileron diSCl)rmett system lbl' spoiler 

runctionality. The current r<."(lu ~mc t of paragraph (g) is: "Within 600 fl ight hours s-inc.e the 

lllt)St recent operational test o f the aileron disconnect system for spoiler fun<:tionalily as of 

the ell"'ective date of this AD. or within 400 11ight hours at\er the cnecthre date of this AD. 

\vhichcvcr occurs firs1: Revise the maintenance or inspection ptogra.m, as applic-able. to 

incorporate repetitive operational tests of the aileron discon.nccc system fiJr SpOiler 

functionality, and all applic-able COI'rective actions. using a method approved by the 

Manager, New York ACO, ANE-170, FAA." 

This leiter approves revising the maintenance or inspection progmm by incorporating 

Bombardier BD- 100-I AIO~ Time Limits/Moimem1nce Checks (TLMC) Manual Pan 3 task 

27~1 ·00-301. ·Operational Test of the Aileron Disconnc<:t System.' inlo lhe maintenance 

program manual as a method of compliance (MOC) to paragraph (g) of AD 2015-15-08. 
In uccordancc 1\ith FAA Order 811 0.1 03A. dated September 28. 20 I 0, the following 

conditions apply: 

I. All provisions of AD 2015-15-0Sdull are not specifically rei<:rcnced above rt:main fully 

applic.able and must be complied with acc.ordingly. 

2. This approval is applicable only to Bombardier Inc. Models BD·I OO·IA I 0 (Challenger 

300), equipped with a spoiler electronic control unit (SECIJ) ha\•ing J)lln numbe~· (1'/N) 

C473JO.Q06, C47JJ0-007. or C47330·008 e<r1itled in any category. 

2 

3. This MOC is transferable. A transferable MOC is an tvi'OC that will cominue to apply to a 

product after it has been transferred to a new O\\ner/operntor. 

4. Before using this MOC, notify your approprinte princirml inspecwr, or lacking a principal 

inspector. the manager of the local flight standards district oflice/ce.nilico.te holding district 

office. 

This MOC only applies to the FAA AD listed above. The FAA does not have the authority to 

approve this as an MOC to any AD issued by anolher civil avjation aUihority (CAA). Approval 

of an MOC to another CAA ·sAD must come from that CAA. 

This approval is subject 10 the tbllowirlg corlditiOrl: 

The New York J\ircraft Cenification Offic-e (NY ACO) will revoke this .MOC if the NYACO 

later de1cm1incs that this MOC does not provide an acc.eptable level of safc.ty. 

If you have any questions per1aining to this mauer, you may comac-t Ass~ a es.~l ine at 5 16-

228-7301 

Sincerely. 

1- r.r~ .fo ~:~Gae ano Sciortino 

Manager, New York 

Aircraft Certification Ollice 

cc. James Delisio (I'DF Copy) 

Assata Dcssaline (PDF Copy}