AC 91-16 Attachment 1 8/7/67 Page 17 Section III - Flight Control Guidance System Description
1. GENERAL DESCRIPTION. This section is intended to provide for the flight crew a description of the flight control guidance system and the purpose it serves, first, as a total system with respect to both crewmembers, and second, as a partial or separate system to be utilized by each pilot flight control system. This section of the manual should, for example, describe the pilot-in-command's flight control system and that of the
a. Similarity and/or differences of systems.
b. Integration of autopilot and flight director systems (when appropriate).
c. Mode selection for each or both systems.
d. Data source for each system.
2. EQUIPMENT COMPONENT DESCRIPIION. Automatic flight control systems usually provide their services through the interconnection of various equipment. Such a system may contain several or all of the following units which should be briefly described as to basic function:
a. Emergency disconnect.
b. Rate gyro.
c. Primary servo.
d. Trim coupler.
e. Sensing unit.
f. Autopilot amplifier.
g. Altitude controller.
h. Airspeed sensor.
i. Pedestal controller.
j. Flight computer.
k. Instrument amplifier.
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Attachment 1 AC 91-16 Page 18 (thru 20) 8/7/67
3. WARNING SYSIEMS. The detection and warning system, its purpose and limitations associated with the flight control system, should be described and may include:
a. Objective of the display and monitor warning system.
b. Location.
c. Comparison warning monitor (if provided).
d. Basic data source displays.
e. Data source comparison displays.
f. Warning flags and data source comparison.
g. Crew cross-check comparisons.
h. Specific failures which may activate the warning flags for a particular system or equipment should be listed. As a typical example, in the case of some flight director systems, the steering computer flag monitors the following:
(1) Flight director AC power.
(2) Flight director DC power.
In the case of a slightly different basic flight director system, the steering computer flag monitors:
(1) Gyro mode, voltage and attitude power.
(2) Heading mode, power and attitude.
(3) NAV/LOC mode, attitude, heading power and VOR/LOC flag voltage.
(4) Approach mode (low) attitude and heading power, LOC and GS flag voltage.
It is highly desirable that this section of the manual contain functional block diagrams of the warning displays available to the crew and the warning data source. Data available from the equipment manufacturers appropriate for use in this or any other section of the Category II manual may be utilized.
LIST OF APPROVED CATEGORY II EQUIPMENT. This list of approved equipment is required as a part of the contents of the maintenance program portion of the Category II manual and, for the purpose of manual approval, need not be listed elsewhere unless the operator wishes to do so. However, if a list is provided in the operations portion, the required list contained in the maintenance program will be the controlling document in the event of any discrepancies between the two lists.
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AC 91-16 Attachnent 1 8/7/67 Page 21 (and 22) Section IV
MAINTENANCE PROGRAM - GENERAL
AC 91-16 Attachment 1 8/7/67 Page 23
MAINTENANCE TERMINOLOGY The term "inspection" as used in this program means inspection conducted by qualified certificated mechanic or a repair station, using the manufacturer's recommended test equipment, or the equivalent, to check Category Il instruments and items of equipment as installed in the airplane.
The term "functional flight check" means a check conducted by a pilot, holding a current Category Il pilot authorization for the type airplane being checked.
The term "bench check" means removal of an instrument or item of equipment from the airplane for:
a. A visual inspection for cleanliness, impending failure, need for lubrication, repair or replacement of parts,
b. Correction of deficiencies found, and
c. Calibration to at least the specifications and standards contained in the 'Schedule of Inspections and Bench Checks" in this manual.
Attachment 1 AC 91-16 Page 24 8/7/67
LIST OF INSTALLED CATEGORY II EQUIPMENT Aircraft N1234 - B-55, Beech Baron, S/N 4255
APPROVAL
EQUIPMENT ITEM MAKE MODEL METHOD USED Group I Localizer receivers AJAX 16L I.C.
Glide slope receiver AJAX 22G I.C.
Glide slope receiver ARCO GS33 T.C.
Marker receiver VOLE AV-21 Evaluation Barometric altimeters OLSMAN 399-B2 Evaluation Flight director GAINS 263-8 S.I.C.
Airspeed indicators ZIPCO 16283 I.C.
(Add additional required Group I items.)
Group II Failure warning systems Evaluation Rain removal equipment Evaluation (Add additional required Group II items.)
Where more than one instrument or item of equipment is required by FAR 91, Appendix A, Section 2, and different makes and models are installed in the pilot and second-in-command positions, each make and model should be listed.
RECORD OF PRIOR 12 MONTHS BENCH CHECKS, TESTS, AND INSPECTIONS 8/7/67 AC 91-16
CHECKED
ITEM MAKE MODEL BY STANDARDS DATE Localizer Receivers AJAX 16L Air Services Co. RICA Paper 10/6/66 Cert. No. 6283 23-63/DO-117 Columbus, Ohio Glide Slope Receiver AJAX 22G RICA Paper 10/6/66 23-63/DO-117 Glide Slope Receiver ARCO GS - 33 Baro. Altimeters OLSMAN 399-B2 FAR 43, Appendix £ 9/3/66 Comm. Transceiver ARCO KM12 Mfrs. Maint. 10/6/66 Manual #863-25N1 Flight Director GAINS 263-B Mfrs. Maint. 11/10/66 Manual #FD-263-B Marker Receiver VOLE AV-21 Mfrs. Maint. 10/6/66 Manual #334-21 Static Pressure FAR 43 9/3/66 System (s) Appendix E Copies of work orders and maintenance releases are available. Page 25 (and 26) Attachment 1
AC 91-16 Attachment 1 8/7/67 Page 27 Section IV
MAINTENANCE PROGRAM - GENERAL The specifications and procedures contained herein are intended to assure that the condition of the listed Category II equipment on which maintenance is performed is at least equal to its Category II approval condition before it is returned to service for Category Il operations.
2. All defects and malfunctions of listed Category II equipment will be entered in the airplane maintenance records. Prior to conducting Category Il operations, the pilot will determine, by review of these records, that all defects and malfunctions have been corrected and all required equipment has been returned to its Category II approval condition.
3. All tests, inspections, and bench checks will be performed at the intervals specified in the Category II maintenance schedule shown on page 31. Any change to that schedule must be approved by the FAA.
4. Bench checks of Category Il instruments and items of equipment will be performed only by appropriately rated repair stations in accordance with the procedures and instructions contained in the bench check procedure section of this manual.
5. A work checksheet will be completed for all bench checks to assure that all required inspections, tests, and calibrations have been made.
worksheet will be filed in the permanent maintenance records of the airplane. Such a worksheet is shown on page 53 of this manual.
Inspections will be conducted using the procedures on the appropriate inspection sheet (see pages 37 - 42 of this manual) to test instruments and items of equipment while installed in the airplane. Where special test equipment is not specified for the performance of the inspection (communications equipment, etc.), manufacturers' instructions or accepted industry practices for operational testing will be used to determine that the equipment will perform as approved for Category Il operation. Defective, out of tolerance, or malfunctioning equipment will be removed from the airplane for bench check, repair, and calibration and returned to Category II approval condition.
7. A functional flight check by a pilot holding a current Category II pilot authorization for this type airplane may be substituted for each alternate inspection.
8. The altimeter will be removed from the airplane and taken to a Class l instrument or a limited class instrument repair station appropriate to the altimeter make and model for bench check and calibration within 12 calendar months of the previous bench check.
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Attachment 1 AC 91-16 Page 28 8/7/67
9. An entry will be made on the Equipment Inspection and Bench Check Record, Form ABC-102, page 32 of this manual, for each inspection and bench check of an item of equipment. Functional flight checks performed by a pilot will be entered on this same form. All data spaces on the form will be completed. Individual Forms ABC-102 will be used for each listed item of equipment.
10. Entries wil1 be made on Form ABC-101, page 33 of this manual, showing the date, airport, and reason for each discontinued Category ll operation because of malfunction of a listed instrument or item of equipment. The entry will identify the instrument or item of equipment that malfunctioned and include a description of the malfunction.
11. All alterations to required instruments and items of equipment listed on page 24 must be approved by the FAA before the equipment is used in Category ll operations.
12. When equipment listed on page 24 is replaced with the same make, model and design, the replacement equipment will be inspected and bench checked using the standards and procedures contained in this program to assure performance at least equal to Category II approval standards.
13. Changes to make, model or design of any components of the flight control guidance system must be approved as installed under applicable type or supplemental type certification procedures or by an FAA evaluation program.
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AC 91-16 Attachment l 8/7/67 Page 29 (and 30) Section V
MAINTENANCE - SCHEDULE AND RECORDS
Aircraft N1234 - Category II Instruments and Items of Equipment SCHEDULE OF INSPECTION AND BENCH CHECKS 8/7/67 AC 91-16
BENCH CALIBRATION ITEM MAKE MODEL INSPECTION CHECK SPECS.
Group I Localizer Receivers AJAX 16L Qtrly 12 mo. RICA Paper 23-63/DO-117 Glide Slope Receiver AJAX 22G Qtrly 12 mo. See page 55 of this manual Glide Slope Receiver AR CO GS33 Qtriy 12 mo. RTCA Paper 23-63/D0-117 Marker Receiver VOLE AV -21 Qtrly 12 mo. Mfr. Manual 334-21 Barometric Altimeters OLSMAN 399-B2 Qtrly 12 mo. FAR 43, Appendix E Flight Director GAINS 263-B Qtrly 12 mo. MEr. Manual FD-263-B Airspeed Indicators ZIPCO 16283 Qtriy 12 mo. Mfr. Manual A-283 (Add additional required Group I items) Group II Static Systems Test and inspect each 12 months to FAR 43, Appendix E standards. Page 31 Attachment 1 NOTE: Where more than one instrument or item of equipment is required by FAR 91, Appendix A, Section 2, and different makes or models are installed in the pilot and second-in-command positions, each make and model should be listed in the above schedule.
FORM ABC-104
Attachment 1 AC 91-16 Page 32 8/7/67
CATEGORY II EQUIPMENT INSPECTION AND BENCH CHECK RECORD A/C reg. no. N1234 MFR. & MODEL Beech B-55 ITEM Marker Receiver MER. & MODEL VOLE AV-21
INSPECTION PERIOD BENCH CHECK PERIOD INSPECTION & MAINTENANCE SPECIFICATIONS USED VOLE AV-21 Maint. Manual #334-21
INSPECTIONS
DATE AGENCY OR PERSON TECHNICIAN
PERFORMED PERFORMING LOCATION OR PILOT 6/6/65 Aero Services, Inc. Cincinnati, O Technician 9/6/66 Q. O. Smith Cleveland, O. Pilot in Comm.
BENCH CHECKS
DATE REPAIR STATION OR
TECHNICIAN
PERFORMED FACILITY PERFORMING 12/4:66 Aero Service, Inc., Cincinnati, Ohio #237 Robt. Jones FORM ABC-102
AC 91-16 Attachment 1 8/7/67 Page 33 (and 34)
DISCONTINUED CATEGORY II APPROACHES AND EQUIPMENT MALFUNCTION RECORD Position Legend:
Pilot - #1 Second in command - #2 DATE AIRPORT A/C REG. MALFUNCTION ITEM DESCRIPTION OF NO. MALFUNCTION 9/2/65 JFK N1234 Glide Slope recvr. #1 Showed flag at OM.
9/10/65 JFK N1234 Barometric altimeters Readings did not agree.
1/10/66 ORD N1234 Flight director No LOC command.
Form ABC-101