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# ANAC AGENCIA NACIONAL DE AVIAf;AO CIVIL

- BRAZIL 

## BRAZILIAN AIRWORTHINESS DIRECTIVE
AD No.: 2009-07-04 Effective Date: 13JuL 2009
The [Qllowir.g 5razilian Aino.'O:!C,,"irreS5 Di"ective (AD). issued by t.he Agen:::i" N"cional de Aviay3.o Civil (ANAC)in accordance wiEh provisi=3 o~ (hapter IV, Title Hi of C6digo BrasileiYo d" ;>..e=ro.duti<;a La'" No. 7,565 dated 19 December 19a6 and ~a.-rento 8rosileiro de Borologa~ AeronAuo:.iea (RB.'Y>.) 19. a?plies 00 all aircrilft regis~ed in ti"r.'Registro Aeronauci= 8rasileiro. So person mayope"a!:e a..,a~c:raEc co •• hich thlS N) atJPli('s, ",,-.lessic has ?revi~ly CCl"plied widl the requiremem:" es~lisl'ed ;'.erein. AD No. 2009-07-04

- EMBRAER

-Amendment 39-1277. APPLICABILITY: This Airworthiness Directive applies to Embraer models EMB-I20, 

### EMB-120RT, EMB-120ER, EMB-120FC, EMB-I10QC airplanes.

CANCELLATION I

### REVISION: Not applicable. 

### REASON: Ithas been found that some fuel quantity probes may fail during the airplane life leading to an erroneous fuel quantity indication to the crew. This erroneous indication may lead to the airplane being operated with less fuel than indicated which may lead to an uncOO1manded in-flight shutdown of one orboth engines due to fuel starvation.

Since these conditions m<lYoccur in other aircraft of type and affect fJlght safety, a corrective action is required. Thus, sufficient reason exists to request compliance with this AD in the indicated time limit.

REQUIRED ACTION: Repetitive functional check ofthe Fuel Quantity Indication System (FQIS). COMPLIANCE: Required as indicated below, unless already accomplished. Within the next 600 Flight Hours (FH) or 

### 180 days after the effective date of this AD, whichever occurs first, accomplish the following: (a) With at least 400 kg (882 Ib) of fucl on each tank perform task number 28-42-00, from one of the EMB-120 AMM listed on table I below, to determine the real fuel quantity on each tank using the dripless measuring sticks; (b) Compare the results of the fuel quantity measured on paragraph (a) above with the master indicator and repeater indicator readings foreach tank. Ifthe difTerence of the indicated fuel quantity is greater than 60 kg (132 lb), accomplish actions (I) or (2) bellow; otherwise no further action isnecessary: (I) If the difference is higher than 60 kg (132 lb) on both tanks, correct the FQIS indication before Ihe next flight; (2) lflhe difference ishigher than 60kg (132 lb)on only one tank, correct the FQ1S indication within 10days after the functional check above, pro\'ided that condition (i), (ii). and (iii) bellow are met; otherwise correct the FQIS before the next flight; (i) After each refueling, paragraph (a) action above is performed to determine (he real fuel quantity on the tank with inoperative indicator; and (ii) Both fuel flow indicators is operating properly; and

Fonn F-900-G4ECONTINUATION OFAD No.: 2009-07-04 • AMENDMENT39·1277 PAGE No.: 212 (Hi) Fuel used Drfuel remaining functions orthe totalizer is operating properly. (e) Repeat paragraphs (a) and (b) above within every 600 HI or 180days, whichever occurs first.

Task Reference AMMPIN Number (!\·laintenance Manual Task Title Task Revision Dale

Publication Number) MM120/14)9 MMI20BASn18 fud QuamilYMeasuring Sticks 28-42·00/001 MM120CAL/921 A,sembly

-DescriptionAlld Jul30,2004 MMl20DLT1724 Opcralilln MM120TF.XfSSO Si>temaMccanicodelndica~iio Pagel:Oct23, 1986 OTFN IVC97-2 deQuantidade deCombustlvcl

-

Dcscri~aoeOpera~iio Page2andon:OctOS,1987 Table I

- EMB 120AMMTaskReferences

Record compliance with this AD Inthe applic.able maintenance log book. CONTACT: Foradditional technical information, contact: National Civil Aviation Agency (ANAC) Aeronautical Products Certification Brancb (GGCP) Av. Cassiano Ricardo, 521, Bloco B,2!!. andar, Parque Residencial Aquarius 12246-870

- Sao Jose dos Campos

-SP, BRAZIL. Fax: 55 (12) 3797-2330 E-mail: pac@anac.gov.br APPROVAL:

ADEMIR ANTONIO DA SILVA General Manager 

### GGCP
DINO ISHIKURA Airworthiness Superintendent

ANAC

NOTE: Original in Portuguese language signed and available in the files of the Aeronautical Products

Certification Branch (GGep) orthe National Civil Aviation Agency (ANAC).