SUBPART B -APPROACH AND LANDING SECTION 4 -AIRWORTHINESS CERTIFICATION OF AEROPLANES FOR OPERATIONS WITH DECISION HEIGHTS (DHs) BELOW 30 M (100 FT) OR NO DECISION HEIGHT (DH) -CATEGORY III (CAT III) OPERATIONS
All Weather Operations (CS-AWO) · CS-AWO · AWO.B.CATIII.102 – AWO.B.RRVR.101
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AWO.B.CATIII.102 CS AWO.B.CATIII.102 Safety level
The safety level for precision approaches with DHs below 30 m (100 ft) or no DH may not be less than the average safety level achieved in precision…
AWO.B.CATIII.103 CS AWO.B.CATIII.103 Go-around rate
The go-around rate below 150 m (500 ft) attributable to the landing system performance or reliability shall not be greater than 5 %.
AWO.B.CATIII.104 CS AWO.B.CATIII.104 Minimum flight crew
The workload associated with the use of the minimum DH shall be considered in showing compliance with CS 25.1523, AMC 25.1523, and CS-25 Appendix D.
AWO.B.CATIII.105 CS AWO.B.CATIII.105 Control of flight path and ground roll
- (a) Landing systems, other than HUDLS, shall control the aeroplane within the prescribed limits along the flight path to touchdown (see CS…
AWO.B.CATIII.106 CS AWO.B.CATIII.106 Control of speed
Automatic speed control shall be provided unless: - (a) the DH is 15 m (50 ft) or greater;
AWO.B.CATIII.107 CS AWO.B.CATIII.107 Manual control
ED Decision 2022/007/R The transition from an automatic mode to manual mode or the use of a manual mode shall not require exceptional piloting skill…
AWO.B.CATIII.108 CS AWO.B.CATIII.108 Oscillations and deviations
The landing system shall not cause sustained nuisance oscillations or undue attitude changes or control activity as a result of configuration or power…
AWO.B.CATIII.109 CS AWO.B.CATIII.109 Alert height
(See AMC AWO.B.CATIII.109) For a fail-operational system with a DH below 15 m (50 ft) or with no DH, an alert height shall be established in accordance…
AWO.B.CATIII.110 CS AWO.B.CATIII.110 Decision height
ED Decision 2022/007/R ED Decision 2022/007/R When the DH is during the landing flare, it shall be below the height at which the major attitude changes…
AWO.B.CATIII.111 CS AWO.B.CATIII.111 Decision height recognition
The recognition of the DH shall be made by means of height measured by a radio altimeter (or other device capable of providing for equivalent performance…
AWO.B.CATIII.112 CS AWO.B.CATIII.112 Go-around
(See AMC AWO.B.CATIII.112) - (a) The aircraft shall be capable of safely executing a go-around from any point on the approach to touchdown in all…
AWO.B.CATIII.113 CS AWO.B.CATIII.113 Installed equipment
(See AMC AWO.B.CATIII.113) The following items of equipment shall be installed for certification to the DHs specified unless it is shown that the…
AWO.B.CATIII.114 CS AWO.B.CATIII.114 Minimum equipment
PERFORMANCE
AWO.B.CATIII.115 CS AWO.B.CATIII.115 Performance demonstration
(See AMC AWO.B.CATIII.115) - (a) Flight path and speed control shall comply with CS AWO.B.CATII.113 and CS AWO.B.CATII.116.
AWO.B.CATIII.116 CS AWO.B.CATIII.116 Head-up display fail-operational hybrid landing system
Where a HUDLS is fitted as part of a hybrid system, its performance need not meet the same criteria as the primary system provided that it:
AWO.B.CATIII.117 CS AWO.B.CATIII.117 Automatic ground-roll control
(See AMC AWO.B.CATIII.115) - (a) When automatic ground-roll control or head-up ground-roll guidance is being used, the probability that the point on the…
AWO.B.CATIII.118 CS AWO.B.CATIII.118 Landing distance
ED Decision 2022/007/R If there is any feature of the system or the associated procedures which would result in an increase in the landing distance, the…
AWO.B.CATIII.119 CS AWO.B.CATIII.119 Mode selection and switching
The system shall be designed so that no manual selections or changes of switch settings need be made below a height of 150 m (500 ft) in normal…
AWO.B.CATIII.120 CS AWO.B.CATIII.120 Indications and alerts
(See AMC1 AWO.B.CATIII.121 and AMC AWO.A.ALS.110) - (a) The display of information to the flight crew, including that required to monitor the approach…
AWO.B.CATIII.121 CS AWO.B.CATIII.121 General
(See CS 25.1309 and its AMC, and AMC1 AWO.B.CATIII.121 and AMC2 AWO.B.CATIII.121) - (a) The effects of failures of the flight guidance system including…
AMC2 AWO.B.CATIII.121 Flight crew and maintenance checks
AMC1 AWO.B.CATIII.121 Flight demonstrations of failure conditions
AWO.B.CATIII.122 CS AWO.B.CATIII.122 Fail-passive automatic landing system (including super fail-passive system)
(See AMC1 AWO.B.CATIII.122(a) and AMC2 AWO.B.CATIII.122(a)) - (a) For a fail-passive automatic landing system, failure conditions resulting in the loss…
AWO.B.CATIII.123 CS AWO.B.CATIII.123 Fail-operational landing system (automatic or hybrid)
(See AMC2 AWO.B.CATIII.121) - (a) For a fail-operational landing system, the probability of total loss of the landing system below the alert height shall…
AWO.B.CATIII.124 CS AWO.B.CATIII.124 Head-up display (or other form of guidance display) fail-operational hybrid landing system
(See AMC1 AWO.B.CATIII.121 and AMC2 AWO.B.CATIII.121) Where a HUDLS is fitted for use in the event of automatic landing system failure, the combination…
AWO.B.CATIII.125 CS AWO.B.CATIII.125 Nose-wheel steering
(See AMC1 AWO.B.CATIII.121 and AMC2 AWO.B.CATIII.121) In showing that the nose-wheel steering system complies with CS 25.745(c), account shall be taken…
AWO.B.CATIII.126 CS AWO.B.CATIII.126 Automatic go-around
ED Decision 2022/007/R Total failure (shutdown) of the xLS facility shall not result in a loss of the automatic go-around capability.
AWO.B.CATIII.127 CS AWO.B.CATIII.127 General
(See AMC AWO.B.CATIII.127(a)) The AFM shall state the following:
AWO.B.CATIII.128 CS AWO.B.CATIII.128 Documentation required
Documentation providing the following information is required for certification:
AWO.B.RRVR.101 CS AWO.B.RRVR.101 Applicability
An aeroplane shall be considered to be eligible for operational credit if it has been demonstrated that the aeroplane complies with Subpart A Section 3…
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