Aircraft
Certification Service Washington, DC U.S. Department of Transportation Federal Aviation Administration
NM-19-17
December 5, 2019
This is information only. Recommendations
aren’t mandatory.
Introduction
This Special Airworthiness Information Bulletin advises registered
owners and operators of Empresa Brasileira de Aeronautica S.A.
(Embraer) Model EMB-135BJ, -135ER, -135KE, -135KL, and -135LR
airplanes, and Model EMB-145, -145ER, -145-MR, -145-LR, -145-XR,
-145MP, and -145EP airplanes, of discrepancies found on electrical
wiring terminations at the receptacles of certain pitot relays.
Based on an assessment utilizing the data currently available at this
time, the airworthiness concern is not an unsafe condition that would
warrant airworthiness directive (AD) action under Title 14 of the Code
of Federal Regulations (14 CFR) part 39. The FAA will continue to
monitor this issue.
Background
FAA AD 2007-04-03, 39-14934 (ANAC AD 2005-08-04R1), and FAA AD
2008-22-19, 39-15716 (ANAC AD 2007-11-04R1), were issued to require
inspecting the pitot heating relays and the direct-vision windowsill
drain hoses, and to replace certain socket contacts with new, improved
parts. AD 2007-04-03 also requires re-routing and replacing the
direct-vision windowsill drain hoses in the area near the relay boxes
with new, improved hoses.
After issuance of those ADs, the Agência Nacional de
Aviação Civil (ANAC), which is the aviation authority for
Brazil, issued Brazilian Special Airworthiness Bulletin (BEA) 2017-03,
dated December 20, 2017, to address degradation (heat damage and
discoloration), insulation dryness, and cracking of electrical wiring
terminations at the receptacles of the Pitot #1, Pitot #2, Pitot #3,
TAT #1 and TAT #2 relays. Since BEA 2017-03 was issued, several cases
of inadequate installation, chafing, and heat damage on the wiring
terminations at the receptacle of the Pitot #3 relay have been found.
In light of this data, ANAC issued BEA 2019-02, dated April 25, 2019,
to inform operators of a new maintenance task and of discrepancies
found on the electrical wiring terminations at the receptacles of the
Pitot #1, Pitot #2, Pitot #3, TAT #1 and TAT #2 relays. ANAC also
issued BEA 2019-04 R1, dated October 14, 2019, to provide that
information for EMB-135BJ airplanes.
Recommendations
The FAA recommends that all owners and operators of the Embraer
airplanes identified above incorporate the normal maintenance actions
outlined in the following service information, at the earliest
opportunity:
For EMB-135BJ (Legacy 600)
airplanes: Maintenance Planning Guidance 1483, Revision 14, dated June
24, 2019, Task 53-Z223-214-001-A00 (EMB145 Aircraft Maintenance Manual
1342, Revision 56, dated April 26, 2019, Task 05-20-13-200-803-A).
For EMB-145 and EMB-135ER,
-135KE, -135KL, and -135LR airplanes: Maintenance Review Board Report
1150, Revision 20, dated June 28, 2019, Task 20-00-00-220-014-A00
(EMB145 Aircraft Maintenance Manual 1186, Revision 64, dated June 28,
2019, Task 05-40-13-200-802-A).
These tasks provide normal
maintenance procedures for inspecting electrical wiring terminations at
the receptacles of the Pitot #1, Pitot #2, Pitot #3, TAT #1, and TAT #2
relays for signs of damage, adequate installation, chafing, and general
condition.
We request that owners and operators submit a Service Difficulties
Report (SDR) to Embraer and the FAA (as identified below) if any
discrepancy is found. Please use Air Transport Association (ATA) of
America Code 3030. Under the provisions of the Paperwork Reduction Act
(44 U.S.C. 3501 et seq.), the Office of Management and Budget (OMB) has
approved the information collection contained in this SAIB, and
assigned OMB Control Number 2120-0731.
For Further Information Contact
Kathleen Arrigotti, Aerospace Engineer, International Section,
Transport Standards Branch, FAA, 2200 South 216th St., Des Moines, WA
98198; telephone and fax 206-231-3218; email:
kathleen.arrigotti@faa.gov.
For Related Service Information Contact
Empresa Brasileira de Aeronautica S.A. (Embraer), EFTC – Return to
Service, Av. Brigadeiro Faria Lima, 2170 - São Jose dos Campos -
SP – 12227-901 Brasil; telephone +55 12 3927-5852 or +55 12 3309-0732;
fax +55 12 3927-3333 (Structures) or +55 12 3927-7334 (Systems); email
rts@embraer.com.br.