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Regulation SLCAP 4210

Authority CAASL — Sri Lanka

Time Standard Local (24h)

Entry Format Decimal hours

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Regulation Source National

Configure via the ⚙ Settings icon in the header.

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Flight duty planner

Build a duty day sector by sector. Enter departure time, flight time, and ground stops. The planner calculates your full FDP and checks all SLCAP 4210 limits automatically.

NOTE: Use the Minutes to Decimal Hours table in the Tables tab to find the corresponding Minute value for any decimal hour entry.

Report time (local)

Pre-flight duties (hrs)

Crew type

Post-flight duties (hrs)

(Not acclimatised) preceding rest (hrs)

Cabin crew?

Augmented crew (bunk relief)?

Sectors & ground stops

FDP lookup

Crew type / table

Report time (local)

Number of sectors

Preceding rest (hrs) — Table B

Cabin crew (+1h)

Actual report (if delayed)

FDP extension calculator

Base FDP from table (hrs)

FDP report time

Extension method

Crew type

Rest period calculator

Preceding FDP / duty (hrs)

Duty finished at

Location

Crew type

Preceding FDP was extended?

Standby calculator

Standby start

Call-out time

Was crew called out?

Sectors after callout

Acclimatisation

Preceding rest (if not acclimatised)

Night standby (home/accommodation 2200–0800, ≤2h notice)?

Check type

Check

Crew type

Rolling duty hours

Last 7 days (hrs)

Last 14 days (hrs)

Last 28 days (hrs)

Next FDP duration (hrs)

Unforeseen delay buffer?

Full duty day scenario

Complete scenario check — FDP, extensions, rest, weekly duty, flying hours, and days off in one pass.

Report time

Crew type

Planned sectors

Total block time (hrs)

Ground stops total (hrs)

Post-flight duties (hrs)

Augmented bunk relief?

In-flight bunk rest (hrs)

Preceding rest (hrs)

Duty hrs this week (excl. today)

Flying hrs last 28 days (excl. today)

Consecutive duty days (incl. today)

Table A — 2+ crew, acclimatised (hrs)

Report time	1	2	3	4	5	6	7	8+
0600–0759	13	12.25	11.5	10.75	10	9.5	9	9
0800–1259	14	13.25	12.5	11.75	11	10.5	10	9.5
1300–1759	13	12.25	11.5	10.75	10	9.5	9	9
1800–2159	12	11.25	10.5	9.75	9	9	9	9
2200–0559	11	10.25	9.5	9	9	9	9	9

Table B — 2+ crew, not acclimatised (hrs)

Preceding rest	1	2	3	4	5	6	7+
≤18 or >30 hrs	13	12.25	11.5	10.75	10	9.75	9
18–30 hrs	11.5	11	10.5	9.75	9	9	9

Table C — single pilot (hrs)

Report time	≤4 sec	5	6	7	8+
0600–0759	10	9.25	8.5	8	8
0800–1259	11	10.25	9.5	8.75	8
1300–1759	10	9.25	8.5	8	8
1800–2159	9	8.25	8	8	8
2200–0559	8	8	8	8	8

Cumulative limits

Window	FC duty	CC duty	Flying (FC)
7 days	55h (60)	60h (65)	—
14 days	95h	105h	—
28 days	190h	210h	100h
12 months	—	—	1000h

( ) = unforeseen delay buffer. FC = flight crew, CC = cabin crew. Values update automatically based on active regulation or airline.

Augmented crew limits

Relief type	Flight crew cap	Cabin crew cap	Min in-flight rest
Bunk (≥80° recline)	18h	19h	3h
Seat (≥45° recline)	15h	16h	—

Extension = rest taken × factor (bunk ½, seat ⅓). Values update automatically based on active regulation or airline.

Commander's discretion

Max extension	Report threshold	Reporting
3h	2h	14 days · Appendix A

Values update automatically based on active regulation or airline.

Standby limits

Max standby	Case A / B threshold	Case B factor
12h	6h	1×

Case A = under threshold (full FDP). Case B = at/above threshold (FDP reduced by excess × factor). Values update automatically based on active regulation or airline.

Rest & days off

Rest — home	Rest — away	Rest — floor	Max consecutive	Min/14d	Min/28d
12h	11h	10h	7	2	7

Values update automatically based on active regulation or airline.

Minutes to Decimal Hours

Minutes	Decimal Hours	Minutes	Decimal Hours	Minutes	Decimal Hours
1	0.02	2	0.03	3	0.05
4	0.07	5	0.08	6	0.10
7	0.12	8	0.13	9	0.15
10	0.17	11	0.18	12	0.20
13	0.22	14	0.23	15	0.25
16	0.27	17	0.28	18	0.30
19	0.32	20	0.33	21	0.35
22	0.37	23	0.38	24	0.40
25	0.42	26	0.43	27	0.45
28	0.47	29	0.48	30	0.50
31	0.52	32	0.53	33	0.55
34	0.57	35	0.58	36	0.60
37	0.62	38	0.63	39	0.65
40	0.67	41	0.68	42	0.70
43	0.72	44	0.73	45	0.75
46	0.77	47	0.78	48	0.80
49	0.82	50	0.83	51	0.85
52	0.87	53	0.88	54	0.90
55	0.92	56	0.93	57	0.95
58	0.97	59	0.98	60	1.00

Use this table to find the decimal hour value corresponding to a specific number of minutes

DGCA Para 6.1 — Two-pilot FDP (by landings)

Landings	Max FDP	Max FT	Condition
6	11:00h	8h	Normal
5	11:30h	8h	Normal
4	12:00h	8h	Normal
3	12:30h	8h	Normal
2	13:00h	9h	Normal
1	13:00h	10h	Normal
≤2	10:00h	8h	Night duty — within acclimatised zone (Para 6.1.4)
1	13:00h	10h	Night duty — beyond acclimatised zone (Para 6.1.3)

Night duty = any FDP encroaching 0000–0600 local. Acclimatised zone = within 3h of departure time zone.

DGCA Para 7.1 — Augmented crew FDP

Config	Max FT	Bunk FDP	Isolated Rest Seat	Basic Rest Seat	Max Landings
3-Crew	12h	16h	15h	14h	2
4-Crew	14h	18h	16h	N/A	1
4-Crew ULR (>14h FT)	17h	21h	N/A	N/A	1

Bunk = flat/near-flat, ≥80° recline, isolated. IRS = ≥45° recline, ≥55in pitch. BRS = ≥40° recline, not adj. to passengers. Min in-flight rest: 90min per crew, 2h for landing crew (Para 7.2.2). WOCL reductions apply (Para 7 Note 2).

DGCA Para 8 — Cumulative limits

Window	Max flight time	Max duty period
7 consecutive days	35h	60h
14 consecutive days	65h	100h
28 consecutive days	100h	190h
90 consecutive days	300h	600h
365 consecutive days	1000h	1800h

Values update automatically based on active regulation or airline.

DGCA Para 9 — Split duty

Consecutive break	FDP extension	Accommodation
Less than 3h	None	—
3h to 10h	½ × break duration	Basic (≤6h) / Suitable (≥6h)
More than 10h	None	Suitable

Each FDP part (before/after break) ≤ 10h. No extension if FDP encroaches night duty. Pre/post-flight duties and transport time do not count as break time.

DGCA Para 10.1 — Minimum rest before flight

Time zones crossed	Minimum rest
0–3 time zones	MAX(preceding duty, 12h)
More than 3, up to 7	MAX(preceding duty, 18h)
More than 7	MAX(preceding duty, 36h)

Transport >30min one-way: rest increases by 2× excess above 30min (Para 10.5). Return to home base after time-zone crossings: >3–7 TZ = 36h + 2 local nights; >7 TZ = 72h + 3 local nights (Para 10.7).

Data & Privacy

This tool runs entirely in your browser. No data you enter is collected, stored, or transmitted anywhere. Everything is cleared when you close or refresh the page.

Planned Update

A future version of this tool will introduce user accounts and cloud storage for saving schedules and roster data.
Before that update goes live, a full data privacy notice will be published and users will be asked to review and accept it.
No backend features will be activated without prior notice.

Regulatory Disclaimer

Important — Please Read

This tool is a reference and planning aid only. It is not a substitute for official regulatory documents.
All calculations must be independently verified by a qualified crew scheduling professional before operational use.
This tool is not certified or endorsed by the Government Aviation Authority or any airline operator.
The developer accepts no liability for operational decisions made solely on the basis of this tool's output.

Reporting an Issue

Found a bug, a regulation mismatch, or a security concern? Please report it responsibly — do not share sensitive issues publicly.

For calculation errors or feature requests — use the Feedback Form or DM on LinkedIn.
For security vulnerabilities — contact the developer directly via LinkedIn or email before disclosing publicly.
Response within 72 hours for all reports.

Intellectual Property

All code, design, and logic in this tool are the intellectual property of Pavishanth Jayaseelan / Hook Creations.
Unauthorized reproduction, redistribution, or commercial use without written permission is strictly prohibited.
This project is open for review on GitHub but is not open-source licensed for reuse.

About This Tool

Developer

Pavishanth Jayaseelan

Hook Creations

Version

v0.3

Test release

Last Updated

June 2026

Hook Creations

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