This chapter covers aircraft and passenger cabin seat maintenance procedures and seat belts and harnesses. Using the handle located under the center of the seat frame, you will adjust the forward and backward movement. To adjust the seat height, turn the large lever under the right corner of the seat.
To adjust the angle of the backrest, pull up on the release button, in the center front of the seat, just below the seat bottom, return the seat to the desired angle and release the button. When the seat is empty, the backrest automatically folds forward when the release button is pulled up. If more than one additional inch of belt is pulled from the retractor, the occupant is too small for the installed restraint system and the seat should not be occupied until the occupant is properly restrained.
If your aircraft has the AmSafe Aviation Inflatable Restraint (AAIR) system, do not perform maintenance on the seats or the seat restraint system unless you first obey all applicable precautions and instructions in the AmSafe Supplemental Maintenance Manual E508804 and the AmSafe Supplemental Maintenance Manual E508804 Maintenance ATA25. If the aircraft has AMSAFE inflatable restraints, do not remove the seats with the seat belts on or the EMA on.
UPHOLSTERY
During each of the specified inspection tasks, more general inspections of the adjacent areas must be conducted while access is available.
PROCEDURES TYPICAL
The AAIR system has four core components: the airbag assembly, the inflator assembly, the electronic module assembly (EMA) and the cable interface assembly.
INFLATOR ASSEMBLY
HARDWARE ASSEMBLIES
AAIR CLEANING
CLEANING AGENT
ISOPROPYL ALCOHOL
METAL PARTS
The maximum continuous storage time for the inflation assembly is seven years from the date of manufacture. The maximum continuous storage time for the EMA is seven years from the date of manufacture.
TIME INTERVALS
MAGNETIC FIELDS
SEAT REMOVAL
The AmSafe seat belt airbag diagnostic check provides a functional analysis of the AmSafe seat belt airbag circuits as a whole. An AmSafe seat belt airbag diagnostic check must be performed after the system is installed on the seat, after the seat is installed in the aircraft, and at least every 4,000 flight hours.
AAIR SYSTEM
CALIBRATE
EMERGENCY LOCATOR TRANSMITTER (ELT) SYSTEM OVERVIEW (25-60-01)
The ME406 is equipped with an instrument panel mounted remote switch with a red warning. The remote switch installed along the upper right instrument panel controls the ELT operating modes from the flight crew station. When the remote switch is in the ARM position, the transmitter will only be energized if the internal "G" switch senses longitudinal inertial forces per TSO-C91a/TSO-C126.
On the ELT transmitter unit is a panel that contains an ON/OFF switch and a transmitter warning light. The ELT installation uses two different alerts to tell the pilot when the ELT is energizing. Check that the remote switch (on the right instrument panel) is set to the ARM position.
Normal operation of the C406-N from the flight crew station is only to disable and enable the ELT after it has been accidentally activated (not an emergency). When the red light above the remote switch flashes and the audible warning sounds, the ELT is energized. To stop transmissions, move the remote switch to the ON position momentarily and then to the ARM position.
The C406-N is equipped with a remote switch on the instrument panel, which includes a red warning light, and an external antenna mounted on top of the rear cone. A remote switch assembly located along the upper right side of the instrument panel controls the ELT operating modes from the flight crew station. When the remote switch is set to ARM, the transmitter turns on when the internal "G-switch" detects longitudinal inertial forces per TSO-C91a/TSO-C126.
When the C406-N is powered, the ELT emits a standard tone signal on the international VHF frequency of 121.5 MHz and the UHF frequency of 243.0 MHz until the battery is discharged. This transmission lasts 440 milliseconds and contains identification data programmed into the ELT, and is received by the COSPAS/SARSAT satellites. The aircraft owner or operator must register the C406-N ELT with the appropriate civil aviation authority prior to use to ensure that the identification code provided by the ELT is in the COSPAS/SARSAT database.
DIRECTION-OF-FLIGHT ARROW
ELT ROD ANTENNA
For IN DEPTH explanations of the ARTEX C406-N locator transmitter inspection/check procedures, refer to the service manual.
FIRST FIVE MINUTES
FIVE SECONDS
TEST EQUIPMENT
JUMPER WIRE
The G-switch installed internally in the ELT transmitter is activated upon a sudden reduction in vehicle speed. The ELT antenna is installed on top of the tail cones ahead of the vertical stabilizer. The ELT remote control switch is a two-position toggle switch that can be placed in the ARM or ON position.
When used in a remote area or over hazardous terrain, it is recommended that the ELT be inspected by an approved technician more frequently than required by 14 CFR 91.207. Normal operation of the ME406 from the flight crew station consists solely of disabling and re-enabling the ELT after it has been accidentally activated (not an emergency). If the red light above the remote flashes and the audible warning sounds, the ELT is energized.
To stop transmissions, momentarily set the remote switch to ON and then set it to the ARM position. If you need to perform the functional test at an hour other than the first five minutes of the hour, you must perform the test with a direct connection to the ELT and a 30 dB attenuator. During an accident, the ELT automatically activates and emits a standard tone on 121.5 MHz (the emergency frequency).
A panel on the ELT transmitter unit has an ARM/ON switch and a transmitter warning light. The bright red visual light above the remote control switch indicates to the pilot that the ELT has been activated. With the ME406 activated, the ELT transmits the standard sweep tone signal on the international VHF frequency of 121.5 MHz until battery power is exhausted.
In addition, for the first 24 hours with the ELT being energized, transmit a 406.028 MHz signal at 50 second intervals. The aircraft owner or operator must register the ME406 ELT with the appropriate civil aviation authority prior to use to ensure that the identification code transmitted by the ELT is in the COSPAS/SARSAT database. The RED warning light on the ELT panel and on the remote switch assembly mounted on the instrument panel should come on.
ARTEX ME406 EMERGENCY LOCATOR TRANSMITTER - SELF TEST (25-60-02)
Operate the emergency locator transmitter system only during the first five minutes of each hour. The 121.5 MHz frequency has the standard sweep tone that rescue personnel can follow to the source. The 406.028 MHz frequency includes other information such as the aircraft country code, aircraft identification beacon serial number, 24-bit address, tail number or other identification.
Perform an inspection of the ELT, mounting tray, antenna and the ELT battery for condition and correct installation. Inspect the ELT and the mounting tray for correct installation, cleanliness, cracks or other damage. If the LED continues to flash, refer to Artex ME406 Emergency Locator Transmitter System Troubleshooting.
If the SARSAT tester did not receive a 406.028 MHz signal and the ELT remote switch LED does not indicate a transmitter problem, redo the test.
SOLVENTS
BATTERY LIFE LIMIT
TEST PROCEDURE
EXPERIENCED TECHNICIAN
The ELT will not activate with the G switch unless electrical pins 12 and 13 have a jumper wire installed between them (this happens automatically when the ELT locks into the mounting tray with the electrical connector in position). Because of the potential physical damage that can occur if the jumper wire is not installed correctly, it is recommended that an experienced technician perform this procedure.
FIVE MINUTES
SARSAT TESTER
ELT BUZZER
TRANSMITTER TEST
ELT SELF TEST
TEST SIGNAL
REGISTRATION
CARBON MONOXIDE
FIRE PROTECTION SYSTEM OVERVIEW
VENTILATE THE CABIN
MAXIMUM CONTINUOUS STORAGE TIME
MAXIMUM ALLOWABLE RESISTANCE
Like the 172, the aircraft can have either the C406-N ELT or the ME406 installed, depending on the customer's requirements and needs.
DIRECTION OF FLIGHT ARROW
