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! Visual inspection of the condition of the bonding wires installed outside the fuel tanks on
pipes of the fuel system on the wing, nacelles, and center wing.
! A bonding check on the ducting and bonding wires installed outside the fuel tanks on pipes
of the fuel system on the wing, nacelles, and center wing.
7.3.2 Summary of Turboprop Inspection Findings
The inspections performed on Fokker turboprop aircraft revealed the following:
! The current routing of the FQIS wiring inside the main fuel tanks on the F27 makes it
difficult to inspect the wiring condition.
! Several mechanical components inside the fuel tanks showed higher bonding values to
structure than expected.
7.3.3 Fokker Jet Inspection Program
Fokker Aircraft launched the Fokker F28 Fellowship program in 1964. The prototype F28 flew on
May 9, 1967. This airplane program saw 241 aircraft manufactured in several different versions or
marks. The F28 had passenger seating ranging from 65 seats (Mark 1000) up to 85 seats (Mark
4000). Two Rolls-Royce RB183 turbofan engines power the F28 Fellowship.
7.0 Fokker Working Group Report (continued)
Page 68 Industry AFFSP Report August 4, 2000
The Fokker 100 program was launched in 1983. The prototype F100 twinjet made its first flight
on November 7, 1987. A total of 278 Fokker 100s were produced for customers all over the world.
The Fokker 100 has a maximum seating capacity of 122 and is powered by two Rolls-Royce TAY
620-15 or 650-15 turbofan engines.
The Fokker 70, a shortened Fokker 100 with seating for up to 85 passengers, was launched in
1992. Deliveries began in 1994, and 47 Fokker 70s were produced for a wide variety of customers
all over the world. Two Rolls Royce TAY 620-15 turbofans power the Fokker 70, which—like the
F28 and F100—has no heat sources located near the fuel tanks that can affect their temperature.
The Fokker 70 was initially excluded from the AFSSP inspection program because of its relative
newness and 100 percent commonality with late-production Fokker 100s. However, deteriorated
bonding wires were recently found inside the wing tanks of two Fokker 70 aircraft. Consequently,
Fokker Services has decided to target a couple of Fokker 70s for inspection during the coming
months to ascertain the cause of this bonding-lead deterioration.
Figure 7-3 below provides information about the Fokker world jet fleet and its inspection.
Airplane type Fokker 28 Fokker 70 Fokker 100
First delivery 1968 October 1987 March 1988
Total delivered 241 47 278
In operation as of Jan. 2000 203 47 275
Highest flight hours (FH)* 67,693 12,937 27,751
Highest flight cycles (FC)* 89,656 10,418 25,534
Total fleet FH* 7,176,280 374,082 4,689,773
Total fleet FC* 8,444,302 324,072 4,208,255
Aircraft (a/c) inspected by June 2000 21 / 4 ® 2 / 0 ◊ 11 / 6 ®
Additional a/c to be inspected © ±3 ^ 3 5 ^
A/c with highest FH inspected # 46,887 12,448 24,438
A/c with lowest FH inspected # 12,167 11,549 11,477
Average FH of inspected a/c # 29,559 11,998 19,012
A/c with highest FC inspected # 53,374 7,726 22,881
A/c with lowest FC inspected # 15,388 6,942 11,098
Average FC of inspected a/c # 37,051 7,334 18,039
* Status as of January 2000
# Status June 2000
^ No airplanes with the ICWT have yet been inspected.
© The planned inspection program has not been completely finalized before the issue date of this final report;
nevertheless, Fokker Services has decided to continue the inspection program with more aircraft.
® Total number of aircraft inspected/number of center wing tanks inspected on the total number of aircraft.
◊ Two Fokker 70s were visually inspected for problems with the bonding wires, as described above.
Figure 7-3: Fokker Jet Inspection Program
7.0 Fokker Working Group Report (continued)
August 4, 2000 Industry AFFSP Report Page 69
The first F28 inspection was performed in 1997 and the first Fokker 100 inspection took place in
1998. The Fokker Services inspection program covers the inspection items outlined in Section 2.0
of this document. In addition, Fokker also inspected for the following items:
! FQIS, boost pump, solenoid, and switch wiring insulation resistance inside the conduits in
the wing fuel tanks.
! Visual inspection of the condition of the bonding wires installed outside the fuel tanks on
pipes of the fuel system on the wing rear spar.
! A bonding check on the bonding wires installed outside the fuel tanks on pipes of the fuel
system on the wing rear spar.
This table identifies the airlines participating in the Fokker jet fleet inspection effort.
Airplane type Operators
Fokker F28
Argentine Air Force
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