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ANAC

AGENCIA NACIONAL DE AVIAf;AO CIVIL - BRAZIL

BRAZILIAN AIRWORTHINESS DIRECTIVE

AD No.: 2009-07-04 Effective Date: 13 JuL 2009

The [Qllowir.g 5razilian Aino.'O:!C,,"irreS5Di"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, ",,-.less ic has ?revi~ly CCl"pliedwidl 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,

EM B-120ER, EMB-120FC, EMB-I10QC airplanes.

CANCELLATION I REVISION:

Not applicable.

REASON:

It has 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 or both 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 of the 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

drip less measuring sticks;

(b) Compare the results of the fuel quantity measured on paragraph (a) above with the master indicator

and repeater indicator readings for each tank. If the difTerence of the indicated fuel quantity is greater

than 60 kg (132 lb), accomplish actions (I) or (2) bellow; otherwise no further action is necessary:

(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 is higher than 60 kg (132 lb) on only one tank, correct the FQ1S indication within

10 days 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-G4E
CONTINUATIONOF AD No.: 2009-07-04 • AMENDMENT39·1277 PAGE No.: 212

(Hi) Fuel used Dr fuel remaining functions or the totalizer is operating properly.

(e) Repeat paragraphs (a) and (b) above within every 600 HI or 180 days, whichever occurs first.

Task Reference AMMPIN

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

Publication Number)

MM120/14)9

MMI20BASn18 fud QuamilY Measuring Sticks

28-42·00/001 MM120CAL/921 A,sembly - Description Alld Jul 30, 2004

MMl20DLT1724 Opcralilln

MM 120TF.XfSSO

Si>tema Mccanico de lndica~iio Pagel :Oct 23, 1986

OTFN IVC97-2 de Quantidade de Combustlvcl -

Dcscri~ao e Opera~iio Page 2 and on: Oct OS, 1987

Table I - EMB 120 AMM Task References

Record compliance with this AD In the applic.able maintenance log book.

CONTACT:

For additional 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).