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AC 20-30B

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Advisory circular · Aircraft Position Light and Anticollision Light Installations

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Approved
July 20, 1981
Last reviewed
January 13, 2017
Family
AC 20-30 · 1 version
Revision
B
14 CFR parts
23, 25, 27, 29
14 CFR sections
§ 23.1385§ 23.1387§ 23.1389§ 23.1391§ 23.1393§ 23.1395§ 23.1397§ 23.1399§ 23.1401§ 25.1385§ 25.1387§ 25.1389§ 25.1391§ 25.1393§ 25.1395§ 25.1397§ 25.1399§ 25.1401§ 27.1385§ 27.1387§ 27.1389§ 27.1391§ 27.1393§ 27.1395§ 27.1397§ 27.1399§ 27.1401§ 29.1385§ 29.1387§ 29.1389§ 29.1391§ 29.1393§ 29.1395§ 29.1397§ 29.1399§ 29.1401

Guidance, not mandatory unless a rule or AD requires it. DRS record last changed October 23, 2026.

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Page 10OCROpen in PDF

TABLE 3. FAR 23/CAR 3 7/20/81

APPLICABLE INTENSITY VERTICAL COLOR FLASH LIGHT AMENDMENTS (CANDLES) COVERAGE SPECS. RATE OBSTRUCTION REMARKS

1. Before 3-1 No Anticollision (4/1/57) Light Requirements 2• Thru 3-1 100 +30 Aviation Red 40-100 0.03 STER. Position of Allowable (4/1/57) Overlap 180 0.15 STER. Obstruction Limited

3. Thru 3-7 100 +30 Aviation Red 40-100 0.5 STER.

(5/3/62) Overlap 180

4. Thru 23-11 400 +30 Aviation Red or 40-100 0.5 STER. New Aviation White (8/11/71) Aviation White Overlap 180 Limits

5. Thru 23-20 400 +75 Aviation Red or 40-100 0.5 STER.

(9/1/77) Aviation White Overlap 180 NOTE: 91.33(c)(3) of the FAR also applies to anticollision light installations and allows the color to be either aviation red or aviation white.

Appendix 1 AC 20-30B

Page 11OCROpen in PDF

TABLE 4. FAR 25/CAR 4b Appendix 1 AC 20-30B

APPLICABLE INTENSITY VERTICAL COLOR FLASH LIGHT AMENDMENTS (CANDLES) COVERAGE SPECS. RATE OBSTRUCTION REMARKS

1. Before 4b-8 No Anticollision (5/16/53) Light Requirements

2. Thru 4b-8 If Used If Used If Used, On-Off ratio (5/16/53) Aviation Red 40-100 Not less than 1:75

3. Thru 4b-3 If Used If Used If Used, On-Off ratio (3/13/56) Aviation Red 40-100 Not less than 1:75 If Extra Light Installed, No Flash Rate Limit in Overlaps

4. Thru 4b-4 100 +30 Aviation Red 40-100 0.03 STER. Position of Allowable (4/1/57) Overlap 180 0.15 STER. Obstruction Limited

5. Thru 25-27 400 +30 Aviation Red or 40-100 0.03 STER. New Aviation White 7/20/81 (8/11/71) Aviation White Overlap 180 0.15 STER. Limits

6. Thru 25-41 400 +75 Aviation Red or 40-100 0.03 STER.

(9/1/77) Aviation white Overlap 180 0.15 STER.

NOTE: 91.33(c)(3) of the FAR also applies to anticollision light installations and allows the color to be either aviation red or aviation white.

Page 12OCROpen in PDF

TABLE 5• FAR 27/CAR 6 7/20/81

APPLICABLE INTENSITY VERTICAL COLOR FLASH LIGHT

AMENDMENTS (CANDLES) COVERAGE SPECS RATE OBSTRUCTION REMARKS

1. Before Part 6 No Anticollision (4/1/57) Light Requirements

2. Thru 6-1 100 +30 Aviation Red 40-100 0.03 STER.

(4/1/57) Overlaps 180

3. Thru 6-5 100 +30 Aviation Red 40-100 0.05 STER.

(5/3/62) Overlaps 180

4. Thru 27-6 400 +30 Aviation Red or 40-100 0.5 STER New Aviation White (8/11/71) Aviation White Overlaps 180 Limits

5. Thru 27-10 150 †30 Aviation Red 40-100 0.5 STER. Aviation White not (2/5/76) Overlaps 180 acceptable NOTE: 91.33(c)(3) of the FAR also applies to anticolision light installations and allows the color to be either aviation red or aviation white.

Appendix 1 AC 20-30B

Page 13OCROpen in PDF

Appendix 1 AC 20-30B

APPLICABLE INTENSITY HSVIA LIGHT

AMENDMENTS (CANDLES) OBSTRUCTION REMARKS

1. Before Part 7 No Anticollision (8/1/56) Light Requirement

2. Adopt. Part 7 None None None None None Approved Anticollision Light Required

3. Thru 7-1 100 Aviation Red 40-100 0.03 STER. Obstruction Position (4/1/57) Overlaps 180 Not limited * U.S. GOVERNMENT PRINTING OFFICE: 1981-341-428:1295 Thru 7-5 100 +30 Aviation Red 40-100 0.5 STER.

(5/5/62) Overlaps 180 5• Thru 29-7 400 +30 Aviation Red or 40-100 0.5 STER. New Aviation White (8/11/71) Aviation White Overlaps 180 Limits 6 • Thru 29-11 150 +30 Aviation Red 40-100 0.5 STER. Aviation White not (2/5/76) Overlaps 180 acceptable NOTE: 91.33(c)(3) of the FAR also applies to anticollision light installations and allows the 7/20/81 color to be either aviation red or aviation white.