Cessna 208/TPE331-12JR Landplane and Floatplane Airplane Flight Manual Supplement
CESSNA CARAVAN 208 FLOATPLANE · Flight Manual
Overview
This document is an Airplane Flight Manual Supplement for the Cessna 208, specifically addressing the standby electrical system. It provides detailed information on the installation, operation, and emergency procedures related to the standby electrical system, which serves as a backup power source in case the main generator fails. The manual is intended for pilots and maintenance personnel who operate or service the Cessna 208, ensuring they understand the functionality and limitations of the standby system. It includes sections on general information, limitations, emergency procedures, normal procedures, and performance, with specific operational guidelines and checks to ensure safe flight operations.
- Standby electrical system rated at 75 amps.
- Load must be reduced by 5 amps for every 1,000 feet above 21,000 feet.
- Emergency procedures include cycling the generator and standby power switches.
- Functional checks of the standby system are required before takeoff.
- No performance change with standby system installed.
Document
Source
Originally published by www.texasturbines.com. Sprinkle hosts a reference copy with an added summary, specifications and searchable full text.
Document details
- Type
- Flight Manual
- Year
- 2010
- Pages
- 6
- File size
- 391 KB
- Publisher
- www.texasturbines.com
Specifications & performance
Extracted from this document.
Specifications
- Engine model
- TPE331-12JR
Common. One of the most common aircraft types we track.
Most owners only have the POH. Here's the essential set for the CESSNA CARAVAN 208 FLOATPLANE.
CESSNA CARAVAN 208 FLOATPLANE for sale now
Free — save the 208 to your watchlist and track it in one place.
More CESSNA CARAVAN 208 FLOATPLANEmanuals & documents
See all 36 →- MOSAIC Final Rule Issuance - Federal Aviation AdministrationAirworthiness Directives
- CARAVAN - CessnaPerformance Data
- YUKON 208 PROPELLER INSTALLATION GUIDE | WipaireParts Catalog
- 8750-Service-Manual-Rev-U.pdf - WipaireV Speeds Reference
- 2022-2023 Catalog - McFarlane AviationParts Catalog
- service manual - WipairePilot's Operating Handbook
- Product CatalogAvionics Manual
- SERVICE MANUAL & ICA WIPLINE 8000 FLOATS ON CESSNA 208Weight And Balance
- GOODYEAR AVIATION DATA BOOKPerformance Data
- INSTRUCTIONS FOR CONTINUED AIRWORTHINESS FOR AN EXECUTIVE INTERIOR INSTALLATION IN CESSNA AIRCRAFT COMPANY MODELS 208/208BWeight And Balance
- Electric Cessna Caravan Supplemental Type Certificate (STC) programSupplemental Type Certificate
- Electric Cessna Caravan Supplemental Type Certificate (STC) ProgramSupplemental Type Certificate
If you fly the CESSNA CARAVAN 208 FLOATPLANE, you may also be researching these.
In this document
General
The standby electrical system is designed to provide power in the event of a generator failure. It features a 75-amp alternator, controlled via a toggle switch on the left sidewall. The system includes circuit breakers for protection and monitoring capabilities through an annunciator panel.
Limitations
The maximum electrical load on the standby system is 75 amps from sea level to 21,000 feet. Above this altitude, the load must be reduced by 5 amps for every 1,000 feet to ensure adequate cooling of the alternator.
Emergency Procedures
In the event of a generator failure, pilots should first attempt to reset the generator switch. If the generator does not restore power, the standby power switch should be cycled. If issues persist, the flight should continue using primary power.
Normal Procedures
After engine start, pilots should verify the standby electrical system is operational. A functional check is required before takeoff, ensuring the standby system can handle the load and that all indicators are functioning correctly.
Performance
The installation of the standby electrical system does not affect the overall performance of the Cessna 208.
Safety notes
- Ensure the standby power switch is off before engine shutdown to prevent battery drain.
- Monitor the STBY ELEC PWR INOP annunciator for potential issues.
Full document text
Supervan Systems, Ltd. Cessna 208/TPE331-12JR Landplane and Floatplane 8955 CR 135 Airplane Flight Manual Supplement Celina, Texas 75009 Supplement S2 - Standby Electrical System (972) 382-4402 SSL-SES-208-12JR Rev. 1 S2-3 December 15, 2010 FAA Approved STANDBY ELECTRICAL SYSTEM SECTION 1 GENERAL A standby electrical system may be installed for use as a standby power source in the event the main generator system malfunctions in flight. The system includes an alternator operated at a 75-amp capacity rating. The alternator is belt-driven from a drive attached to the accessory section of the engine reduction gear housing. The system also includes a function control module and alternator control module (FCM/ACM), shunt, and current limiters located in the electrical junction box on the left front side of the firewall. There are two control switches on the left sidewall switch (start) panel. The standby system switches are a two-position toggle-type switch, labeled STBY PWR, and a guarded two-position toggle- type switch/breaker, labeled AVIONICS STBY PWR. The guard covering the standby avionics power switch must be lifted in order to select the ON position. Circuit protection and isolation are provided by two 40-amp circuit breakers, labeled STBY PWR, on the left sidewall circuit breaker panel. Field excitation to the alternator control unit is supplied through diode logic from either the CLOCK circuit breaker in the electrical junction box or the alternator bus through a poly-fuse assembly located in the electrical junction box. System monitoring is provided by an amber light, labeled STBY ELEC PWR INOP, in the annunciator panel. Total amperage supplied from the standby electrical system can be monitored on the airplane volt/ammeter with the selector switch in the ALT position. Any time the standby electrical system is turned on, the alternator will load share approximately 10-20% of the total load with the generator. The alternator will assume the total load if the generator is turned off or the generator trips off line. It may be necessary to load shed if the total load exceeds the 75-ampere capacity. The AVIONICS STBY PWR switch/breaker and AVIONICS BUS TIE switch must be ON to utilize the 75-ampere capacity. Also, the AVIONICS 1 and 2 power switches should be OFF to avoid feeding a possible fault in the primary power system when operating on standby power. The primary power supply system can be completely isolated by pulling the six 30-ampere bus feeder circuit breakers in the event of a fault in the primary power relay box. Supervan Systems, Ltd. Cessna 208/TPE331-12JR Landplane and Floatplane 8955 CR 135 Airplane Flight Manual Supplement Celina, Texas 75009 Supplement S2 - Standby Electrical System (972) 382-4402 SSL-SES-208-12JR Rev. 1 S2-4 December 15, 2010 FAA Approved Figure S2-1, Caravan Electrical System with Standby Alternator Supervan Systems, Ltd. Cessna 208/TPE331-12JR Landplane and Floatplane 8955 CR 135 Airplane Flight Manual Supplement Celina, Texas 75009 Supplement S2 - Standby Electrical System (972) 382-4402 SSL-SES-208-12JR Rev. 1 S2-5 December 15, 2010 FAA Approved SECTION 2 LIMITATIONS When operating on the standby electrical system, the maximum electrical load is 75 amps from sea level to 21,000 feet. To assure adequate alternator cooling at higher altitudes, reduce maximum electrical load 5 amps per 1000 feet above 21,000 feet up to the maximum operating altitude. SECTION 3 EMERGENCY PROCEDURES GENERATOR FAILURE – GENERATOR OFF ANNUNCIATOR ILLUMINATED 1. Generator switch – OFF, then ON. If primary power is not restored: 2. GEN CONTROL and GEN FLD Circuit Breakers – RESET (if tripped) and repeat step 1. If GENERATOR OFF annunciator remains illuminated and STBY ELEC PWR INOP annunciator is illuminated: 3. STBY PWR Switch – OFF, then ON. Check STBY ELEC PWR INOP annunciator extinguished and the ALT ammeter showing a positive load and GEN ammeter load a decreased load due to sharing with the alternator. 4. AVIONICS STBY PWR and AVIONICS BUS TIE Switches – ON. 5. AVIONICS 1and 2 Switches – OFF. 6. Volt/Ammeter – SELECT ALT and verify alternator load is 75 amperes or less. REDUCE LOAD as required to prevent battery discharge. If GENERATOR OFF annunciator is illuminated and STBY ELEC PWR INOP annunciator is not illuminated: 3. Perform steps 4, 5, and 6 above. If GENERATOR OFF annunciator is extinguished and STBY ELEC PWR INOP annunciator is illuminated: 3. STBY PWR Switch – OFF, then ON. 4. STBY ELEC PWR INOP Annunciator – CHECK extinguished. If STBY ELECT PWR INOP annunciator remains illuminated: 5. STBY PWR Switch – OFF. 6. Flight – COMPLETE utilizing primary power. NOTE If the STBY ELEC PWR INOP annunciator illuminates, the alternator system may still be operational. A bus voltage surge may have temporarily tripped the ACM (alternator control module). If so, the ACM can be restored by cycling the standby power switch. Supervan Systems, Ltd. Cessna 208/TPE331-12JR Landplane and Floatplane 8955 CR 135 Airplane Flight Manual Supplement Celina, Texas 75009 Supplement S2 - Standby Electrical System (972) 382-4402 SSL-SES-208-12JR Rev. 1 S2-6 December 15, 2010 FAA Approved SECTION 4 NORMAL PROCEDURES AFTER ENGINE START 1. STBY ELEC PWR INOP Annunciator – Verify ON. 2. STBY PWR Switch – ON – Note slight decrease in generator load to signal load sharing. 3. STBY ELEC PWR INOP Annunciator – Verify OFF. BEFORE TAKEOFF The following functional check of the standby electrical system should be accomplished on the first flight of the day before takeoff, and must be completed prior to any icing flight. 1. Standby Power Switch – ON 2. Generator – LOAD to approximately 30 amps (use taxi lights, if required), but not more than 60 amps. 3. Volt/Ammeter – SELECT ALT position and verify alternator output is approximately 10-20% of the generator load. 4. Start/Gen Switch – OFF. 5. GENERATOR OFF Annunciator- VERIFY ON
Show full textShow less
6. Volt/Ammeter – CHECK alternator picked up generator load and alternator voltage is approximately 28 volts. 7. STBY ELECT PWR INOP Annunciator – VERIFY OFF. 8. Start/Gen Switch – GEN. 9. GENERATOR OFF Annunciator- VERIFY extinguished. 10. Volt/Ammeter Selector Switch – RETURN to BATT position. NOTE The STBY ELEC PWR INOP Annunciator will not illuminate, except in the event of a broken alternator drive belt, an electrical malfunction in the standby electrical system, or the Standby Electrical Switch is OFF. Engine Shutdown The standby alternator receives field current from the KEEP ALIVE 2 circuit or the CLOCK Circuit, so in an emergency condition, the standby alternator can be brought on line without turning on the battery switch. Normal engine shutdown procedures call for turning the standby power switch off prior to shutting the engine down and turning the battery switch off. If the standby power switch is inadvertently left on, several of the red lights in the annunciator panel will remain illuminated after the battery switch is turned off. The illuminated annunciators serve as a reminder to turn off the standby power switch and thereby preclude draining the airplane’s battery. SECTION 5 PERFORMANCE There is no change to the airplane performance when the standby electrical system is installed.
What's in the CESSNA CARAVAN 208 FLOATPLANE TCDS
A Type Certificate Data Sheet (TCDS) is the FAA's record of what an aircraft type was approved as. It is the source of truth for weights, seating, fuel and the rules the design was certified against. Expand any line to see what it means.
168 CESSNA CARAVAN 208 FLOATPLANE parts for sale
See all →
Parts listed for sale by vetted eBay sellers — confirmed on eBay at checkout.